Nicki and Meek hit up Ace of Diamonds in L.A., and while they looked like they were having fun ... they seemed more like mom and dad chaperoning a dance.
The Rae Sremmurd guys, on the other hand, were lit! Check out the video ... Slim Jimmy had about 2 armfuls of cash -- about $15k we're told -- and spent it liberally on Malani Ca$h. She's the one on the pole in the video, and Jimmy's dating her.