Having
worked at two
shooter bars which both include the slippery nipple as a part of their menu, I have this to add.
Although a part of the same "
up-and-coming"
chain of bars, the first place just used
sambuca with
Irish cream floated on top, while at the second place we used to put a cherry in the bottom of the shotglass. This was explained to me when I started off as "If it hasn't got the
cherry, it's not a slippery nipple, it's just
slippery."