Separate yourself from whoever you came with, and stare at it, seemingly mesmerized. Soon, you will hear the distinctive snap of fingers, the owner summoning the artist like Bette Davis summoning a waiter in some old movie. You will be introduced, and it's important to have a mysterious question for the artist ready. Chances are they will make up an answer to support your theory on the spot, having been carefully coached. This will be the most entertaining part of your evening.
Nothing entertains like a good lie.
Watch the gallery owner get the special glint that says they think they just made a sale. Wander back to consult with your companion, then, you should probably leave, because the gallery shrew will jock you endlessly for the balance of the evening. I know I say this about everything, but wear good shoes . This will give you the credibility to pull off all these slick dance moves. People do notice, because remember, the function of the opening is to find out who's got the money, and then take that money away from them.