Citi Field
Citi Field (or, as some call it, Taxpayer Field) is the Mets' home in Queens, having replaced Shea Stadium. By all accounts, Citi Field is a pleasant place to pass a warm summer evening. Just be prepared to pay for it.
To get there, take the 1,2,3 to Times Square, then take the 7 to Mets/Willits Point.