Not even a 29-point loss to his former team could stop James Harden from getting in some quality time with Travis Scott and Lil Baby ... 'cause the Sixers superstar went out with the his rapper friends right after the game.
The Beard had a less-than-stellar performance against the Brooklyn Nets on Thursday ... scoring 11 points and going 3-17 from the field.
But the bad night only lasted on the hardwood, 'cause the 32-year-old was spotted out celebrating a friend's birthday out in Philly shortly after the L .