Kyle: Ay bro, empty house this weekend!
Joe: Oh damn, are you inviting that chick over?
Kyle: No way! I was going to call up the bros for an epic bro night. I was thinking we'd get drunk and moon cars on Sunset Blvd.
Joe: Let's do it!
Bro-night is a night when a group of male friends get together to do something in the intentional absence of women.
This is typically undertaken by a group of friends who are all in committed relationships, and wish to get away from womanly things, and eat pizza with their dude friends.
P1: Hey fella's bro-night is this tuesday, ditch ya bitch and come get some pizza.