The facial recognition camera they use is an ID checking machine. They're basically used to prevent liability for underage drinkers, and to keep track of banned patrons.

They're not actively scanning your face in the club, and I question how good the facial recognition actually is.

Regardless, it's a private establishment, you don't have to go there and get your face scanned if you don't want to. You do have legal recourse, you can choose not to patronise that establishment.