Upstairs/downstairs: Restaurants and bars branch out with subterranean spaces

How about this two-for-one deal. The modern speakeasy is not a new phenomenon in NYC (hello, Acme and Ginny’s Supper Club). But over the past few months, several bars and restaurants have branched out with subterranean spaces, complete with different names, decor, cocktails and bites. Here are four upstairs/downstairs joints to know.

Meredith Deliso