I thought of a few more!
Alpha trait: This sim wants to be the leader of their group gatherings. They don't like to follow someone else's lead. I think this could help with the clubs thing.
Beta Trait: This is a sim that always follows. They tend to not make decisions. Maybe even get a positive moodlet when another sim orders their food for them at a restaurant. (It could be devastating with the Analysis Paralysis trait I mentioned earlier lol.
And this one could be a number of traits. A particular category of clothing is your favorite. Meaning:
Cold Weather clothing lover
Warm Weather clothing lover
Swimsuit lover
PJ's lover
These sims love to wear these particular types of clothes. And if paired with the laundry, if their favorite category of clothes aren't clean enough, they receive extra negative moodlets. Something like that!