if you live in NYC, and you dont know good spots, you shouldnt live in NYC.
spots in queens:
Astoria Banks (in astoria.)
Flushing Meadows Park (globe fountain)
flushing library 8 set (on main st. in flushing, right near the train station.)
murray hill LIRR station banks (right off of main st., at murray hill station.)
theres a bunch of little stuff along Northern Blvd. as well.
you're better off staying in the city. much more spots. lots more fun. better atmosphere for riding.