Jewish Community Centers of North America - This is the place to find the JCC in your area. The JCC is often a hub of activity for single Jewish people, but the quality of the JCC varies, depending on where you live.
The JCC in Manhattan - This is maybe the best JCC in all of North America, located in its own modern building.
Hillel - Hillel is the "foundation for Jewish campus life," and is probably the very best place to meet a Jewish person of the opposite sex if you're lucky enough to be a college student or even a graduate student.
