Chris Brown -- Clubbing Ain't What It Used to Be

Chris Brown went clubbing Friday in West Hollywood ... and things were tame/boring.

Brown and GFish Karrueche Tran hit up Hooray Henry's last night ... and left in subdued fashion -- except for the car, which was kinda baller.

As TMZ first reported, Brown has told friends he's swearing off drugs and purging all negative influences from his life ... because he never wants to see the inside of a jail cell again.

Which is probably why he looked so bored inside the club.