My job doesn't have me socialize, but my location does. I live in a big tourist area, so there are always tons of interesting clubs/bars/shows/events to go to in the evenings, and I'm the kind of person that loves to do that stuff. I'm out probably 4 nights a week. . .here are the things that helped me the last time I was losing weight, and are helping me now on my newest 30 lbs:
1. I try to remember that my stomach is the size of a fist. . .and I don't eat more than that at a given event.
2. No nibbling! Seriously. If I'm going somewhere with only those foods, I eat before, and give myself a set number I can have (usually 4). When I'm done I'm done.
3. Glasses are perfect props. I used to always have a plate of food with me as a prop so I didn't look out of place or dull. When I realized that's what I was using it for, I discovered simply carrying a glass with me as I wander the room is effective and less calorie-fulll! Plus, as long as you acknowlege it's a prop, it can have other stuff besides alcohol in it. . .I like to alternate 1 non alc. drink with one alc. and sip the both slowly.
4. I also try to remember that not-having food in my hand/mouth opens me up for dancing and conversation. I also know many people look at the "fat girl" eat and judge, so as awful as that is, it helps
5. I don't stay at boring things. If I can't make them interesting I leave (after a polite time, of course). I used to stay and eat out of boredom
6. Sit/hang out with the other skinnies. Those are the people you notice NOT eating constantly. They're either thin b/c they know when to stop or probably like you and trying to be thin. You form your own unspoken support group when you're with them because none of you are making those non-verbal cues to eat more.
7. Try to attend active functions whenever possible. I took a ballroom dance class to brush up on skills long forgotten from my teen years, and now we can go out salsa dancing, and I can tango like a goddess (ok, so that's kinda an exaggeration
) when I go somewhere with old-school dancing or a good live band.
8. walk a lot. When we go out, many of my friends like to take taxis from one place to the next if they're more than a few blocks, but there's really no need. I have a friend who also walks, and we can cover 20 blocks no problem and not notice because we're chatting the whole time! It's a good way to get extra exercise in, and you don't have to deal with cabs.
I'm not doing amazingly, but this has helped me have a social life while not gaining back the 30 lbs I lost a year ago. Plus, I have way more fun when I'm out now. Hope it helps!
How do you manage your weight as a socialite?
Not to mention that while I am working, I can't be at home working out. 
