Last night Lindsay Lohan snuck out of her West Hollywood apartment and headed to her home away from home, the Chateau Marmont, where she was hanging with notorious ladies man John Mayer!

Actress Rena Riffel (Showgirls, Mulholland Dr.) told us, "I was up there with Lindsay and John Mayer, they were just relaxing out on the patio, we were all drinking wine."

But before you think Lindsay's diving back into drinking, Riffel was adamant that Lindsay was not hitting the bottle, "She's not drinking, NO, she's drinking water," Rena emphatically told us. As for whether or not Lindsay's diving back into men, a source revealed that Sam's been telling everyone the two are back together ... would Lindsay jeopardize her relationship for John Mayer???

Rena also said she wanted Lindsay to appear in the Showgirls sequel as a stripper! Well, considering she already played a stripper in I Know Who Killed Me and is set to play porn star Linda Lovelace, that sounds like the perfect role!