Speaking only for myself...
Bring...let me think...just you. No need to bring anything else, unless perhaps a pen and paper to take notes (though there is NO quiz at the end). I bring a camera, but only as I like to see the Club have a shot from each meeting for our history. Other than that, the topic for the evening might dictate if there's anything you might want to bring (camera if we're doing a mini-shoot at the meeting, photos for critiquing, etc.)