Long Distance Relationship Vs. Work Friends?

I just moved to LA, where I have tons of new work friends asking me to go clubbing or drinking ALL the time. The thing is, I was never really a part of the club scene in college, and I’m also engaged to a wonderful man who lives in Boston, where we went to college together.
My friends know I’m in a long-term serious relationship, but NONE of them are in relationships as serious as mine, so I think they don’t really understand– in fact they mostly just have short hookups or date multiple people. I’m totally fine with their choices, but we’re all the same age (23-25) and I don’t want to look like the old lady. I admit that I never told my new buds I was engaged- it always seemed really out of place to tell them.
I don’t really enjoy drinking– it’s too expensive and I only really like to go to bars when my fiance is also there. I definitely don’t like clubbing, especially when I’m there and appear to be a single girl. I’d much rather go to coffee shops or art museums or performances, or stay in and cook or watch sports.
How do I turn down my friends’ invites to go out clubbing and drinking? It seems like their only mode of hanging out, ever. Most days after work I just want to go back to my apartment and talk to my fiance on Skype. But I see these friends at work ALL the time– they really are my only friends here, and I want to hang out with them without being a bummer on the party. I don’t want to be the girl that everyone thinks is boring or never gets invited to hang out… Heaven knows I’m already feeling lonely enough being long distance with my fiance. What should I do?

What Are Your Thoughts About A Long Distance Relationship?

My fiance and I are in a Long distance Relationship. The past 20 months, we’ve only spent 11 days together. We have our share of laughter and tears, but amidst all of that we still find time out of our day (her morning, my evening) to talk to each other, give our “I love you’s and I miss you’s” to each other. If we averaged it, we have spoken at least an hour a day and have never missed.
We use YM, skype and direct Long Distance using our cellphones… Up to now we have not missed a day not hearing from each other, even just by SMS. We watch movies together (same DVD), play chess, read news and magazine articles, take surveys, send message to friends, chat with friends, play billiards and also tease and seduce each other.
We miss each other everyday and know that our next meeting will be sweet, passionate and exciting. We were college sweethearts, now apart and will eventually be married and spend the rest of our lives together. What are your thoughts? I am just but curious.