Which countries don't allow men to enter a nightclub without women?

For example, in Turkey and I think in Armenia, it is expected than men have to go with women to most nightclubs. Does this happen in other countries?

For example, in Spain it's not common (maybe some fancy ones if they want to have more reputation), what they may do instead to get a balanced ratio is not charge women, give them free drinks, let them enter if underage... I've been told that in Ukraine and Romania it's not common either, you pay the ticket and that's it.