One thing Chris Brown may be done with is gangs, but gang bangers … not so much.

Porn stars Alexis Texas, Bonnie Rotten, Alektra Blue and Sarah Jessie posed backside first for a pic at Chris Brown’s Beverly Hills bash Thursday night.

Also on deck, porn star Kimberly Kendall — who tweeted a pic of Chris dancing with her and a bunch of other hot chicks after blowing out the candles.

As we previously reported, T-Pain told us there was no weed smoking allowed at the party.

Porn star booty > smoking weed.