It's like the LAST place you'd expect Kris and Caitlyn Jenner to hang out -- but here they are ... tossing beads together off a balcony to drunk Bourbon Street revelers.
We're told the exes were in the French Quarter shooting for an episode of "I Am Cait." They hit up a couple bars and tried their hands at the Mardi Gras bead tradition. Far as we know, both women kept their tops on though.
Girls just wanna have fun ... but not THAT much fun.