It wouldn't have occurred to me, either, until I came across it enough times to realize that a) it wasn't a typo b) it wasn't a joke and c) I should try it. There are a couple of rum/gin combos in the "Jamaican Jollifiers" section of the Old Waldorf-Astoria Bar Book that, it turns out, work pretty nicely.
That sounds very interesting. Especially the gin/rum combination. Not something that would ever have occurred to me
Did the subway token make it into your final product, Sam? Without it, though, yours definitely sounds like one of the Old Waldorf drinks, which ain't a bad thing.
And slivovitz? Why not? I should be a mensch and go out and buy some.