Ex-NBA Star Boobie Gibson -- BOOTY HUNTIN' ... At Erotic Hollywood Nightclub

Now that Keyshia Cole's moved on ... her ex-NBA star ex-husband Boobie Gibson is also on the rebound -- and last night went on the prowl for some top shelf chicks at an erotic Hollywood club.

TMZ Sports has learned ... the former Cleveland Cavaliers player hit up Penthouse Nightclub in West Hollywood -- along with some huge Hollywood stars like Meagan Good, Vivica A. Fox, "LHHH" star Sincere Show and Too Short.

But all eyes were on the in-club GLASS SHOWER -- where half naked women would soap themselves up and wash themselves down in front of everyone.

It was insane.

We're told there was also an "erotic pool table room" -- where very, very barely dressed women would grind on each other (and on the pool equipment) while people watched, danced and played pool.

It was insane.

Also at the club, NBA star Brandon Jennings and his GF Tae Heckard. We're guessing it was no coincidence that they found the cameras since Brandon's ex Teyana Taylor just went public with her new relationship with NY Knicks player Iman Shumpert.