And yes, the females wear lock necklaces while the men wear keys.
As the night unfolded, I began to realize this concept is quite genius!
After watching the crowd (who were all so friendly), they were so much more receptive to one another than the usual club gathering.
In a conventional lounge atmosphere, approaching someone may be difficult, but not here. That would be a raffle ticket that may lead to a plethora of prizes and the chance to get another lock/key.
Magazines and websites produce periodic Best Cities for Singles stories that judge communities mainly on how easily their unattached residents can become attached.