Personally strip clubs are okay for men to go to but when they have girlfriends and they go just for 'fun' it's unfair on the poor girlfriend under a number of reasons, she may be unhappy with herself as it is knowing her partner is going to watch some other women dance around him with good bodies, also she might feel that she has to then compete with these women after her boyfriend going to these clubs seeing perfect bodies and boobs. In these circumstances men with partners should be more respectful and consider how their girlfriend feels unless the girlfriend agrees with it then fair enough.
Personally that's my opinion, people may think different but everyone's entitled to their own opinion.