A submarino combines tequila and beer. Just as with the boilermaker, you fill a shot glass with tequila, then drop it into the beer glass. I got the recipe from The New York Bartender's Guide.
While whiskey can make beer - especially a lager - better, tequila definitely makes it worse. I'm glad to have tried it but I won't be having it again anytime soon.
Bitters of the Month
We tried the plum bitters as a substitute for Angostura in a Manhattan. There was a mere hint of something different in the aftertaste and in the aroma. Basically, I think it would do in a pinch but isn't really worth keeping in the regular rotation.