Proprietor of the 15 West 40th apartment building.

S2E2 - Joel offers to buy an apartment in Mr. Greenberg’s building for Midge. Greenberg is speaking to Joel when Midge arrives, and leaves them to talk. Ultimately, the sale does not go through.

JOEL: I-I like the molding, but I may want to strip the paint off. Is that possible?
GREENBERG: It's getting late.
MIDGE: Knock-knock.
JOE: Midge, great. Come in. I'd like you to meet Mr. Greenberg. Mr. Greenberg owns the building.
MIDGE: Oh, well, your parents must be so very proud.
GREENBERG: Don't touch anything. The paint's not dry.
– S2E2

2. Mid-way to Mid-town

• List of Characters