Bethenny Frankel -- DENIED At Nightclub -- Strong Arm Tactics FAIL

Awkward.

Bethenny Frankel tried to talk her way into TAO nightclub in NYC early last weekend ... and when her charm failed her, she tried brute force ... and that failed too.

You gotta see the video, but first let us set the stage.

Bethenny showed up at TAO for a private party, but she wasn't on the guest list so the bouncers blocked her. That's when Bethenny got PISSED and tried to strong arm her way in ... first trying to unlatch the rope and then trying to limbo under it.

Our Bethenny sources insist she was invited to the event, but someone screwed up and left her name off the list.