Before anyone jumps all over me and says "Tacky, what's wrong with you...." this is why I'm asking. A polite "not a good idea" will suffice.
Anyway...I have a lot of guests coming in from out of town. We've attended each other's weddings and been to conventions together. I know how we travel...we tend to share rooms, and arrive for whatever event a few days early for sightseeing and carousing. Since I can't afford to issue an open invitation to everyone like the last wedding we attended, would it be ok to just start a FB group so invitees can coordinate transportation and hotel rooms together. I want to avoid "Hey, want to share a room at J's wedding" "I wasn't invited" awkwardness.