dachshund convention
A party, club, or event where almost all the people are guys. It's like a meat market for men, full of sweaty bros and zero ladies.
At the bachelor party, there were 20 guys and 1 guy in a dress.
The gaming convention was 90% dudes, and the rest were just there to take pictures of the guys.
My friend’s work party had 10 guys and 2 guys who brought their wives.