What's the Collective Noun for a Group of Bros?

I made the switch over to a large gym recently, and was a bit unsure about working out in and navigating through a new space. This gym attracts a more bro-like demographic than gyms that I have used in the past and, boy, did that make me feel nervous. However, my fears could not have been more unfounded. Every person I have encountered through my daily workouts has been so respectful and understanding of the fact that a gym is, at its core, a communal space. Thank you for allowing me to recognize my own biases and proving me wrong at every turn! —Happier and Fitter