It's a great party city. You'll enjoy it, I'm sure
Although it is a chain,
La Vaca Argentina, Canos Del Peral 2, does great meat at reasonable prices.
Galopin, Caballero de Gracia 22, is more formal but does great Catalan food. For something a bit different you could try the Moroccan restaurant,
Cocina del Desierto, C/Barbieri 1, near the Metro station at Gran Via y Chueca.
There are loads of breakfast and coffee bars around the Sol area to help your hangover, too. Have a great time.
Edited for spelling.
[This message has been edited by ajamieson (edited 09-18-2003).]