Well, I own Nightlife, but it's not installed yet. Dude677 is the one doing all this, though, not me, and he doesn't have Nightlife. So yeah, Popularity sounds right for you. Popularity Sims basically like interacting with people (especially friends) as much as possible, like to make new friends, and throw parties.
All Sims can have the want for premarital... well, it's called "Woohoo" in the game, but the Romance Sim is the only one that the want randomly spins up for--and they usually don't care who with. The only times I've seen non-Romance Sims have the want for Woohoo (whether married or not) is during more of an up-the-ante process. It starts when they have the want to flirt, and they're in love with the person they flirt with or fall in love right then. Then the want to Kiss and then Make out with that person spins up; usually after the Make out, the want for Woohoo (specifically with that person) will spin up. With adult Family Sims, after a Make out, they usually want Engagement with that person, as well (if they're not already engaged/married). Of course, what happens is all up to the person playing the game. ;)
Long story short, Sims can have "premarital Woohoo," or you can make them wait. It's easier to make non-Romance Sims wait, since the want only spins up under specific, controllable cirumstances, and not constantly like Romance Sims' do.
As for alcohol, the only wants I've seen related to it are "Buy a bar," "Serve drinks," and "Hire a bartender," and you can buy champagne (usually done for parties and weddings), but again, it's totally controllable as to whether they actually drink or not. I rarely EVER even see those wants at all, anyway. Also, I don't even think Sims can get drunk, although that would be funny. (Of course, with Nightlife, I have no idea if any of this changes or not.)