Pigs are flying

T is coming for a visit. A very short visit, but nonetheless he intends to spend 1 to 2 nights in NYC. The opera is sold out. It's the one thing I was banking on. The opera never sells out, but the Monday he'll be here is Ms. Taymore's Magic Flute. I can't think of a single other thing he might like... maybe the museums. How can I entertain in the most entertaining place in the world? I'm working against his natural dislike of crowded or cramped places too.