It's not like going to France and getting offended that everyone is speaking French.
Strip clubs, tit jokes, objectifying others, homophobic slander, and transphobia as part of a company 'culture' is toxic.
Just as its not a valid argument to say hey its my culture to repress minorities and claim my race and gender is superior, its also not a valid argument to say using the N word and worse and sexually harassing coworkers and their partners is just "my culture".
Gaming is a legitimate, large, potentially wonderful community (see GDQ and a lot of other great organizations and subcommunities), but asking people to not be total abusive assholes to female coworkers is NOT much to ask, and the only way it can diminish the community is if the community believes that harassing and being abusive towards women is one of the primary pillars of that community.