Simply put, men can always find their way around stadiums and arenas. The women usually end up following men. Neither of them is counting time outs, commercials, or replays. And so on. Women on a girls' night out talk the whole time.
Men use restrooms for purely biological reasons.
Women use restrooms as social lounges. Men in a restrooms will never speak a word to each other. Women who've never met will leave a restroom giggling together like old friends.