Do you use the Club system?

I always use clubs. Not all of my Sims are in clubs, but I do use clubs to keep my community lots lively. I make sure my template saves have a number of clubs that populate the bars, nightclubs, libraries, parks, gyms, etc. It does help that I mostly play with aging off so clubs don't die out. But if I were to play with aging on, I'd probably use MCCC's clubs module a lot more.