I work in a unique setting: 12-hour rotating shifts in a 911 center with 20 men. I have 5 coworkers on my list- my supervisor and 4 friends. On my shift there are 2 other guys who aren't part of that group. I obviously want to invite my friends, but kind of feel bad not including the other 2 guys on my shift. Would it be rude to invite almost my whole shift except those 2? Or is that ok to leave them out?