There are three BizElite lounges at JFK. One in Terminal 2, and two in Terminal 3. One of the ones in T3 is the old DL First Class lounge and is very small. The other BizElite lounge in T3 has a spectacular view of the ramp (if you're a plane spotter).
The lounge in T2 is on the upper floor, and has access to the cleanest bathrooms in the terminal (Terminal 2's bathrooms on the arrivals/departures level are a disgrace).