Sex roulettes are now the modern-day adult chat rooms.
Simply put, their randomness sparks attention and the surprise factor is fun.
No need to go out to find a girl who would like to have fun too. Be sure girls are here to show off their beautiful bodies and have sex, not for the free drinks and nonsense. You can feel the real connection and this is what turns us on when we have real sex.
Not to mention, you can talk to strangers at fast rates.