I was hunting a park which was a biker hangout in the 70s and found about 20 of these things with different designs, they have been discussed here before but never figured out their original purpose.
I have a small stash of these, all kinds. I recovered mine from a building that was being torn down in Kansas City. You wouldnt believe some of the stuff they put on these coins lol! But they were used in an adult theater/arcade (at least mine were). I have not found any others.
Some may find that one offensive, but wait till the gays demand one too! Imagine that.
Maybe Obama will have a new coin made to commemorate same sex marriage. Not a new nickel, but rather a dickel.