Fine sloppy dining in Reykjavik. Serves a burger with fries and "cock-tail sauce"(ketchup and mayo) for a mere 6 Euros(a steal in Iceland).
Never fear, it has a liqueur licence.
For the more adventurous of you, I recommend the Forget-me-not special - which is a sloppy burger with blue cheese. Costs a bit more, but life's short, and getting shorter.