Madrid for the weekend

[Schmitty 87]

Hello,

I'm going to be in Madrid from Saturday morning until Monday evening, and I'm looking for things to do. I was going with my roommate, but he got really sick so now he's probably not going to go. So now it's just me. Anyone been there and had good experiences? Since I'll be there alone and I speak no Spanish (roommate is fluent), I'm likely gonna take it relatively easy, so I'm looking for museums and sights and what not more than nightlife suggestions (though those will also be appreciated of course).