Ahh hard question. Two of my favourite gps...
Well...
Dine out is great cause it adds the ability to go out for dinner with a date, friends, family or just alone. You can even order a birthday cake and celebrate at the restaurant. You can create any kind of restaurant and change the menu, making it specialized in vegetarian food, fish, meat, ice cream, burgers, experimental food... you can also own a restaurant, but that's something i never did.
Spa day brings the wellness skill and wellness activities. I love yoga because it makes me relaxed to watch my sims practice it, and they become fit and muscled. You can add a trainer's mat and a few regular yoga mats and create an area where yoga classes will happen autonomously and your sim can participate. There are also several kinds of massages and meditation. And there's the sauna... You can also do all kind of spas, or just mix academy and spa stuff to create a complete workout lot.