Tristan Thompson seen hanging out with women at the Vegas Club

Tristan Thompson lives a single life, parties in Las Vegas... with at least one lovely lady hanging from his arm.

The NBA star was seen hanging out at Marquee Nightclub in Sin City early Sunday morning (around 1:30 a.m.), where we were told he was with a group of 3...a guy, who appeared to be his wingman for the night, and some girls. One for each guy.

TMZSports.com

Eyewitnesses told us the group was definitely together the entire time and seemed to be having a good time - dancing with each other and chatting with drinks in tow.

At one point, we were told that the woman Tristan seemed to be in tune with had actually danced to him...and that they were very affectionate. As you can see in this video, obtained by TMZ, Tristan appeared to be holding her tightly and whispering in her ear.

TMZSports.com

Finally, we are told that the crew left around 3am. It's unclear who any of these people with Tristan might have been - he's certainly not someone we recognize in his immediate circle.

Now we know what...