Or you could always turn it around to be a positive day maker, amd have a George Clooney lookalike waiting on the inside as someone comes through the average door and say something like....
"I'm sorry, but I think that Madame has come in through the wrong door".
Unless the lady in question is an absolute munter, it could work, and would be great PR for the store.
No. Seconds thoughts.
Way too risky.