I've had some success in night game with it, but only:
1) When executed as
a. "You look familiar, are you German and/or were in New Deli last winter?"
"You look familiar, are you the rodeo clown from Dallas who can jump 5 feet in the air?"
(Both of these set up to segue into dhv / cf stories during the immediate moment when shes stunned trying to comprehend all that detail)
b. "Do I know you?" (Executed like a rock star alpha in the frame of 'it is a privilage to knpw me, are you permitted to be near me? If not you should leave.)
In either case, wrap it up quick (initkal contact should last less than 30 seconds) do a DHV Roll Off (high energuly shift to a different set) and ignore her for at least a minute (depending on the venue - longer if you have more social proof, shorter if its crowded). Be sure to conclude that you do not in fact know her
3 re-initiate the conversation by telling a story or explaining ( not explaining TO her but as if talking to yourself and she is the object of your pondering) going through the tbought process of where you met the person she looks like.
4 DHV roll off several more times (really whenever she stops looking intrigued or confused) and re-initiate the convo thread.
5 open new sets and into her in, bring HBs to her vicinity and intor them to eachother as if it is a runnimg joke that you have never met her, but thought for a second that you did
It can work, alot to keep track of tho ^