The Stanley Cup was a whore last night ... because it let all sorts of strangers rub their mouths and butts all over it for hours ... and TMZ has the pics.

The enablers were several members of the world champion L.A. Kings -- who treated Stanley to a night of mayhem at Beacher's Madhouse at the Roosevelt Hotel in Hollywood.

During the show, the Kings were entertained by The Little Kings -- a band of little people dressed up like their NHL counterparts ... who used the cup as a chair when their tiny feet got tired.

We're told the Kings arrived to the party with David Beckham ... and were met at the venue by UFC legend Chuck Liddell ... who filled the cup with beer and had the Kings hoist it up so he could chug with the champs.