Go on Steam, look at the most played games right now, look at the demographics for those games.
Or pick some player profiles at random, count how many girls vs guys you find (very easy to tell with high accuracy just by looking at the games they play, yes there are exceptions but they're actually quite rare, I promise you can get >90% accuracy after you do a few).
Steam user base is at least 3/4 male by user count, probably even more by play time.
