In Rhode Island:
the town of Mystik. Like the movie... =) Block Island is just off the coast from there. Tropical island off of RI??? Yep.
We also checked out Fire Island, partying ground for many, and it WAS awesome.
NYC:
Central Park Summer Stage has free concerts in Central Park.
http://www.summerstage.org/Florida:
You've already taken the Kennedy Space Center tour.
The next space shuttle launch isn't until August.
Southport Raw Bar. Live, love, last longer. =)
Ft. Lauderdale/Miami:
Hard Rock LIVE concerts
http://www.seminolehardrockhollywood.com/hard%5Frock%5Flive/You'll miss the largest boat show on the east coast.
Key Largo and south:
John Pennycamp State Park (1st underwater park in the country) No motorboats allowed. Great to dive.
Better fishing the further down you go, so I've been told. I think it's all good in Fl.
I rented a Mitsubishi Spider GT convertible and drove all the way to Key West and stopped along the way to swim with the dolphins. A blast.
In Key Largo...
http://www.dolphinsplus.com/Get reservations if you plan on staying in Key West. Peak season can be a zoo and tough to find lodging.
Awwww, scratch that east coast trip and go the the Bahamas!!! Bimini? =)