A Cohesive World

Oasis Springs should have a pool. I say this so definitively because that place gets HOT in the summer and it has no pools anywhere because no pools in base game at launch.

Other ideas:
A board game cafe
An outdoor theater
You could have libraries and museums that are designated that way by default but set up to be art centers/schools or commercial office work spaces, or like an Internet cafe or a city hall.

A roller rink
A bowling alley (maybe some sort of Rec center)

A community center/shelter/motel that provides free beds and showers (for if you ever do a Rags to Riches challenge)

Community garden (which could even be like, you could have an orchard on one lot and just a flower garden on another - depends on how much you and your Sims like gardening)

A wedding venue (which could either be a religious building or a city hall or community center type building)

Restaurants if you have dine out

Spas using combo SE and SD

I’ll come back if I think of more.

ETA: not sure how your Elementary school operates but you could do a building (perhaps another school or this same one) where it’s set up with skill building for children and teens like a tutoring center or somewhere to go after school or on the weekends.

A music academy for learning the music related skills (and possibly dancing).

If you have fitness stuff you can do a gym specifically with a rock climbing wall area.

Perhaps Magnolia Promenade could have bars/restaurants.

DSV could have a nightclub or lounge.

Some form of retail like an electronics store or furniture store or a toy store.

Some sort of factory for skill building the handiness/woodworking skill and doing the Eco Lifestyle crafting stuff.

Vacation activity ideas is very tough for me to think of. Sulani can have the water activity stuff. When I have gone on vacation IRL, I go to restaurants and shop and go to historical sites or natural sites or museums or large shows at venues. I’m not really sure how to translate that into gameplay. I suppose you could add national parks and have activities for like the wellness skill, or pools that look like lakes/ponds, ways to obtain certain harvestables, etc.

Oh, maybe some sort of amphitheater or stage location for musical performances.

Maybe some sort of social club with the intention for Sims to gain Charisma skill.

(Basically I like to think of all of the skills that Sims can gain and how that can translate into gaining those skills on a community lot, that way you can make use of different kinds of community lots that also help your Sims, and you don’t have to fill their houses with all kinds of objects specifically for the skill).

Some sort of science museum for the rocket, for example, would be more fun to me than having a rocket on a residential lot.

@NationalPokedex - wow! Thanks for all of these ideas. I never even considered some of them. The board game cafe...what a great place that would be to take my families. A rock climbing gym for my super athletes or just for a night of hanging out...these are really awesome ideas!

Those are great ideas. There was a recent thread on Community Lots and I've been searching but haven't found it yet.

@Mstybl95 No problem! I find brainstorming fun, and I want to make over all of my worlds one day too, so I've been thinking of some of these ideas.

Also, I'm going to assume you don't have Jungle Adventure based on not including its map, but if you did and if it were possible, a dance academy could be cool because JA comes with a new cultural dance.

Maybe some sort of place for toddlers to gain skills also, like a makeshift preschool.

Oh okay.

Maybe you could have a dog park (I know there's already one in BB but I'm assuming you'll be having all sorts of pack mixing and matching across worlds anyways so a dog park in another world wouldn't be strange, I think).

Maybe a garden/store that sells the OR plants so that you can make the herbalism skill more accessible.

I like some of those ideas up there already listed I have a lot of builds I don't use all the time that I place depending on the families I play the most, like kids restaurants for different age groups, one with toy decorations, another with a play area inside and I believe one that has a nap area, unless that's just a hangout. Can't remember now but it's fun to also make tiny little changes here and there as if your main worlds are adapting over the "sim years" with your family. One of my favorites is still the bowling alley we got I like to clean up the top part and make it a restaurant so with the bar and that, entertaining one group anyone younger can bowl and play at the arcade machine. Just a thought, I'm not as creative but I enjoy my nonsense.

Idea that feeds this. No computers, hobbies, pools, side activities at your home lot. Finding more fun, have to go out and interact with the world. Pools, skating rinks, movie theaters are my top useless, but fun much.

I almost always put my bowling alley where the Oasis Springs business area is because it just goes there to me.... with the beach there you've given me the idea to add fun things, maybe a rollerskating rink and retro diner. Keep it kind of retro cool looking with the beach below. Maybe one rental there for people that want to go/hangout and collect... not sure about that one but there are only 4 lots.

Either Oasis Springs or Windenburg could have a dig site that gives tours to visitors (zoned museum, perhaps with a little cafe).

The suggested pool in Oasis Springs could be ancient bath (roman, arab, whatever culture you use) themed.

You already made Strangerville all military (cool idea), otherwise I'd suggested a botanical garden.

For the travel regions maybe train or bus stations? I have a cafe in Mt. Komorebi right across the slopes that is built like a train from the inside so that I can let my sims travel there. However, from the outside it looks like an equipment renting shack.

Great ideas! Thanks for the inspiration.

I want to have a seedy town. Where do you think I should put the criminals? I usually put them in Oasis Springs because I hate the desert and rarely go there. LOL...but I want to actually play the criminals and I want OS to be a party town like Las Vegas.