Is NOBODY wrong in the post ? POST : My friend had her bachelorette a couple weekends ago. The two ladies organizing her bachelorette sent out an email about the bachelorette in September (6 months prior) asking us to RSVP. I initially said I could go, but between September and March my work schedule changed (which is not unreasonable I don't think?), and I was only able to spend the Saturday night instead of both Friday and Saturday. I emailed them a few weeks prior to the bachelorette about this (even though I hadn't heard from them at ALL yet), and I got no response. Five days before the bachelorette, I got an email detailing the entire weekend and the costs, which amounted to $430 per person, for approximately 15 girls. I told them I could only make it the second night, and they said that since everything was already booked, I would have to pay for the AirBnb, bus and driver they rented out for the weekend, the prix fixe wine tasting and luncheon on Saturday afternoon (which I couldn't attend). They were able to exclude the cost of some miscellaneous items (not sure which) but that I would still need to pay $370. 

Am I being unreasonable in thinking that paying $370 for one night (which basically included dinner, a bus taking us to and from the club, and a bunk bed for the night) is WAY too much? They didn't consult us at all about costs, or what we would be doing, etc. in the six months between the invitation and the email outlining the event. I emailed her back saying that I was surprised at the costs, and I offered to pay for the AirBnb, (because obviously they had to book a house big enough for everyone for the whole weekend - they weren't going to get a new AirBnb the next night to accommodate changes in numbers), the private bus (even though it would've been WAY cheaper to get Ubers) and the Saturday night prix fixe dinner. She responded saying that they already paid for everyone's wine tasting and luncheon ($150) on the Saturday morning/afternoon, and that it would be unfair for her to absorb the costs because I RSVP'd initially. The poor bride got sucked into it, because she then ended up texting me separately asking me what the problem is, etc. 

Am I being an asshole here?!