This was the case for me once, the main reason was so I could be there for my best friend since she too wasn’t close with most of her sisters friends. We were also the only ones underage but the brides sister (my bff) was the MOH so she wasn’t gonna not go. It ended up being a lot of fun, we ate all their snacks and drank all their booze and got to finish whatever drinks they didn’t like when the bartender wasn’t looking lol. Don’t speak to a single one of her sisters friends to this day!
That being said, just planned a Bach for my own best friend and I dropped out of the wedding because of the shit show it became from her shitty fiance and friends I don’t like. So do whatever you need to do in order to choose peace and have fun. I think the fortunate thing about not caring about the bride or bridal party is you can let it roll off your back instead of dreading the carry over drama at the wedding itself