Tequila and grapefruit juice

That's all, just tequila and grapefruit juice. Tastes great with the bitterness in the tequila complimented by the bitter grapefruit. It's easy to make, which makes it a good cocktail for bars that aren't great at cocktails (receptions, for ex). If you salt the rim of the glass, you get a tequila Salty Dog, aka Perro Salado, aka Salty Chihuahua.

I learned this from my parents in the 60s. They threw cool parties, with motorcycles in the yard, skateboards in the house, and a blender on the sideboard. They mixed frozen margaritas, daiquiris, and salty dogs. The kids got the same, without the alcohol - lemon, lime and grapefruit slushies. I remembered the salty dogs as being made from tequila and grapefruit (they are usually made with vodka). Good times.

Remind me to do a cocktail column on Japanese shochu. A couple of places in Tokyo do a nice shochu and grapefruit juice. They give you a half grapefruit and a squeezer, along with a glass, ice and a shot of clear liquor.