All 5 of my bridesmaids are single, so when I mailed out their invitations I gave them all plus ones. I didn't expect any of them to use it, but I thought it would be a nice gesture in case any of them started dating someone in between now and the wedding. The wedding is also out of state for all of them, and me and my fiancé have offered to pay for their rooms (nice, expensive hotel) and when we asked if they would mind splitting rooms with the other bridesmaids nobody minded. This made it work out with 3 rooms total, 4 bridesmaids sharing 2 and me and my MoH in one.
All of my bridesmaids are friends, and this is the other reason I didn't think any of them would be bringing a date, just because even though they're traveling, they are traveling together, staying together, all know each other, and know that everyone else is single.
Recently, I've heard that one of my bridesmaids is planning on bringing a friend as a date, someone we both used to know back in college but I didn't stay in touch with after graduation, and who obviously didn't get their own invitation to the wedding. This bridesmaid is also trying to convince all of the other bridesmaids to do the same thing! I'm not really sure what to do, because even though I gave them all plus ones, I obviously didn't expect them to try to find a bunch of people I used to know to bring to the wedding as their friends! Now I'm going to have to pay for probably twice as many (expensive) hotel rooms, invite these random people to an intimate rehearsal dinner (just wedding party and immediate family), probably hang out with them on my wedding day (We are paying for all of the bridesmaid preparations and we were all supposed to hang out all day), and sit with them at our head table.
Keep in mind, I understand this is their right to bring dates since I offered them plus ones, but I didn't think they would just be bringing random friends (especially people I used to know back in college but haven't talked to in close to 8 years), I would feel completely differently if these were actual dates!
What can I do? Nobody has RSVPed yet with these random friends, so I feel like now would be the time to cut it off at the head, but can I? I get the feeling that they don't quite understand how much this inconveniences us, and that our wedding is not the time for a college reunion with a bunch of people I never talk to.