Boxer Danny Garcia: Parties After Victory ... Bring On Mayweather!

The champ is here ... and he's ready to party!!!

Hours after Danny "Swift" Garcia beat Robert Guerrero to clinch the welterweight world title on Saturday, the boxing star hit Playhouse nightclub feelin' no pain!

Danny wore some shades to cover the bruising -- but the guy was in a great mood ... ready to turn all the way up with his entire entourage.

We also asked if he was ready to fight Amir Khan or Floyd Mayweather (who was ringside at the fight) ... Garcia had a message to both of 'em -- BRING IT ON!