Pelosi and Lee hit up Steph Curry and the gang outside the Warriors' locker room after they got the W ... thanking the NBA champs for their trip to the nation's capitol, where they snubbed Trump in favor of hangin' with local youth.

But before the meet-and-greet, the SF and Oakland democratic reps got their fangirl on in the stands!! (Dope scarf, Nancy ... but Barb wins with her custom "The Town" jersey.)

“They make us proud ... they are civic leaders. We are huge fans,” Lee told the Washington Post.

FYI, Pelosi invited the Dubs to hang with her in D.C. after POTUS pulled their White House invite ... but the fact that she sought THEM out says a lot.

Guessing they'll hook her up with better seats at Oracle ...