I agree with the "Go to the party with your friend" crowd!
Hopefully, that friend will never have a bachelor party again and there will be other times for you to be alone and dress up.
And, it seems that if you moderate the party going a little, there would be some time for both!
Looking back, I regret many of the times where I chose to isolate myself for the sake of getting dolled up, instead of spending time with family, friends or colleagues. 20/20 rear view vision!
Hugs
Suzie