EXCLUSIVE

The Stanley Cup is probably nursing the mother of all hangovers right now ... 'cause hours after the L.A. Kings beat up the NJ Devils, the champions took the trophy to their favorite local bar in Hermosa Beach.

Stanley Cup Finals MVP Jonathan Quick -- along with several of his teammates -- brought Stanley to the North End Bar and Grill last night ... where the unofficial team celebration went down.

But Stanley wasn't the only piece of championship hardware in the building, Quick also brought along his MVP trophy ... which sat right next to Lord Stanley's Cup at the front of the bar.