Ronnie Ortiz-Magro Kisses Woman in Chicago Nightclub

Ronnie Ortiz-Magro is single and very much ready to mingle … because he’s back on the nightclub scene, making out with women … and it’s all on video.

The ‘Jersey Shore’ star looked in his element Friday night at Tunnel in River North Chicago, locking lips with a blonde.

Folks who were there say Ronnie hit up the club with a buddy, and the woman he kissed was already in the joint when the reality TV star showed up … the flirty duo didn’t come together.

Ronnie seemed like a big hit in the club, and not just with the ladies … he also took a bunch of photos with fans.

We’re told Ronnie didn’t get too rowdy or anything, and he wasn’t seen drinking alcohol.

Remember, Ronnie told us last year he’s sober … and he’s only a few months removed from calling off his engagement to Saffire Matos.