Munchkin is a great game, but it's one you can't play with board game or TTRPG people. You need either alcohol or people who aren't used to/don't worship strict board game rules and who aren't afraid to muck about with stupid shit or pile on other players. The sort of person who's favourite game is CAH or "uh....I dunno chess maybe?', not "here's my six hour dissertation on why Jamestown: now with Wheat is the best"