Plot summary
The boys crash a neighborhood "Pride" party for gay men, mistaking it for an MMA-themed bash. Desperate to fit in (due to the free liquor and snacks) they drink heavily and pretend to be gay themselves, to the point in which they wake up with terrible hangovers and little recollection of what happened, only to be informed that they may have gotten closer with each other in ways that make them uncomfortable.
Credits
Adapted from Wikipedia contributors, Workaholics season 5. HTML formatting and reference markers removed.