Drake -- Comfy in Club with New Woman (VIDEO)

Drake breezed into a club Sunday night and hung with a woman -- not Serena -- which tracks with what we're hearing ... that Drake isn't dating the tennis star.

Drake spent more than 2 hours at The Nice Guy in West Hollywood. He arrived alone and left alone, but people in the club say he hung with the woman who entered and exited just minutes after Drake.

Her name is Ravie Loso -- an Instagram model -- who definitely has a similar build as Serena, and is clearly into Drake. While they were in The Nice Guy, she tweeted ... "Ever since I left the city you ..." -- lyrics from his song, "Hotline Bling."

Our Serena sources insist Serena and Drake are not dating, despite the pics showing physical interaction. The sources say they're long time friends ... and that's it.

To be continued ...