Club circles can contain men as well. Oftentimes these men are former pursuers of the women they are dancing with, only these men have been unfortunate enough to hit the friend zone. As such they are now regarded as sexually neutral by their female friends and have probably been brought to the club in order to serve as bodyguards against other males. Subsequently they tend to be very hostile towards males (their hostility stemming from repressed sexual frustration) and can also be very possessive and jealous. Cockblocking is also one of the activities they engage in.
Guy 2: I know man. The club circles are really tight tonight.