Even though it was a school night, the stars still came out to celebrate Rich Paul's birthday on Thursday ... including his GF, Adele, and his BFF, LeBron James!!
The trio -- plus Tristan Thompson, Clippers head coach Tyronn Lue, and others -- hit Olivetta in West Hollywood for the festivities ... despite everyone having a lot going on this week.
James' Lakers play Friday night. Adele's Vegas residency continues then, too. Lue, meanwhile, coached the Clips in a loss to the Suns before hitting the bash.
Still, everyone appeared to be in great spirits ... and most (aside from Adele, who bolted early to presumably get back to Nevada) stayed out until midnight -- when Paul officially turned 41 years old.
The sports agent looked dapper for the party ... rockin' an all-brown 'fit, capped off with a pair of brown shoes.
James, meanwhile, looked great as well -- as did his wife, Savannah, who accompanied him on the date.
Didn't seem anyone brought gifts to the dinner for Paul ... but we're pretty sure at least one of the millionaires at the table picked up the tab for the guy.
Happy Bday, Rich!!!