Vegas Nightclub Rats Out Lindsay Lohan

4/20/2009 1:54 PM PDT
Lindsay Lohan needs to choose her friends ... and her clubs more carefully, cause she just got thrown under the rehab bus.

Lindsay spent what she thought would be a private evening this weekend at Prive nightclub at Planet Hollywood Resort & Casino in Vegas --until the club fired off a gratuitous press release, allegedly exposing her relapse.

In the release, the club buried this item -- "Mel [B] was drinking Merlot and Lindsay asked for a Vodka drink mixed with soda water and a splash of cranberry."

It squarely contradicts Lindsay's outburst last week, when she said "I don't drink...a**hole."

With friends -- and clubs -- like this ...