1. Try the oysters at the Mermaid Inn.
2. Pretend like it's 1991 all over again at Lollapalooza at the PNC Bank Arts Center.
3. Hear historian Edward T. O'Donnell talk about New York's "second worst catastophe" (covered in his book, Ship Ablaze: The Tragedy of the Steamboat General Slocum) at Barnes and Noble.