John and Jen met up for a not-so-secret rendezvous in NYC last night -- and the Brit hit the fan when one of her bodyguards started smacking paps with an umbrella outside La Esquina.

Police were called to the scene to help regulate Jen's exit, where she actually spoke to TMZ -- saying she doesn't agree with 66% of our voters who won't watch Mayer's new CBS variety show.