Prince Harry put the crown jewels on display in Vegas this weekend … getting BARE ASS NAKED during a game of strip billiards with a room full of friends in his VIP suite.  It all went down Friday night during a raging party in a high rollers hotel suite. We’re told Harry, along with a large entourage, went down to the hotel bar and met a bunch of hot chicks … and invited them up to his VIP suite.  Once in the room, things got WILD … with the group playing a game of strip pool that quickly escalated into full-on royal nudity. Some of the partiers snapped photos of the madness. In one photo, a fully nude Harry cups his genitals while a seemingly topless woman stands behind him.  In another photo, a naked Harry is bear-hugging a woman who appears to be completely naked as well.  No word on who the women are … or if they got Harry’s phone number. A rep for the Royal Family tells us, “We have no comment to make on the photos at this time.” TMZ