So I work in a small(ish) office... about 12 of us and all women. The most tasteful way that I can put this is that we are a "different" bunch. There are 3 girls that I am very close with... we go out to lunch together, see each other outside of work, etc. However, when it comes to the rest of the office, it's tough. There are a few people who are Dr. Jekyl/Mr. Hyde; they are your friend one minute, then the next minute there is something stupid that annoyed them and they are mad at the whole office. Then there are a few crazies. Between the two groups, there is a lot of troublemaking going on... exactly like middle school.
The thing that I'm not sure about is who to invite. Do I invite them all, to avoid any potential problems in the office? Or do I go with my instinct and just invite my friends that I know actually care about going?