Do you go them?

I started this job 6 months ago. I'm the only developer and the only time I talk to other people is when I'm working on a project for them. To make matters worse, I'm single; so I would be going stag.

I don't want to be rude and say no, but at the same time; it seems like it would be extremely akward if I did. So I'm up in the air about the whole thing.