Two Bachelor parties?

So my fiancé’s family is very reserved and laid back. His brother is the best man and planned a laid back bachelor party for my fiancé’s brothers, dad, my dad and my brother. But, my fiancé is really close to my side of the family (including uncles, cousins etc) and they weren’t invited to the party thrown by his brother. My dad wants to throw him one as well including my side of the family doing things my family would like (strip clubs, bars etc). Is that stepping on his brothers toes? If he were to throw one, should he still invite his brothers and dad? He’s not trying to be rude to his brother but my fiancé was really excited to go out with EVERYONE. Anyways, should my dad throw one and if so should his brothers and dad be invited?