Bill Clinton -- SURROUNDED BY HOOKERS

Bill Clinton has really whore'd himself out this time -- surrounding himself with real prostitutes.

Slick Willie probably had no clue ... but the women Bill posed with at an L.A. charity event Thursday night are two star hookers at the famed Nevada Bunny Ranch brothel.

The brunette goes by Ava Adora and the blonde goes by Barbie Girl. According to her bio on the BR website, the blonde is very flexible and specializes in de-virginizing. The brunette "knows how to please a variety of both men and women."

We have no idea how they got in to the star-studded Unite4Humanity charity gala -- which honored Clinton along with several other philanthropic celebs like Robert De Niro and Martin Scorsese -- but we can take a wild guess why they showed.

Bubba's really on a roll -- back in 2012, he got cozy with a couple porn stars at a gala in Monaco.

God we hope Hillary wins.

10:45 PST -- Sources close to the people who ran the event say the 2 hookers were not invited guests -- they were more than likely someone's plus 1 -- and were removed from the party after snapping the pic with Clinton.