A friend at work told me about what I'm convinced sounds like the best drinking game EVER. It's meant for a bar, but if you've got a good selection of booze, you could no doubt still play it. I'll list the rules for the normal bar version though.
Four Jacks
Four players, deck of cards. Each player takes a card from the top of the deck and turns it over, taking it in turns.
First person to get a jack = picks a drink, any alcoholic drink they want.
Second person does the same.
Third person goes up and buys a drink made of the two mixed together in a half pint glass. So if it's say JD and beer, get a half pint of beer, and put a JD in it. Presumably if it's two shots you just put them both in a glass and down it...
Fourth person drinks it
Shuffle and start again
You do this while drinking your normal regular drinks.