The Outing (season 4, episode 17)
written by Larry Charles, directed by Tom Cherones
original airdate: February 11, 1993
Jerry and George are mistakenly outed by a reporter. They try to squash the rumor that they are gay: “Not that there’s anything wrong with that.”
FEATURED LOCATIONS
Jerry’s Apartment
NYU reporter Sharon Leonard interviews Jerry and George, before they figure out her assumption, with George trying to remedy the situation: “Do want to have sex with me right now?! Come on, let’s go, baby!” Jerry later mocks the situation on Kramer’s two-line phone, only making matters worse with the reporter.
Monk’s Café
Elaine, having fun with the eavesdropper behind Jerry and George, begins to talk to them as if they are a gay couple…but the eavesdropper turns out to be a reporter doing a feature on Jerry, who then “outs” them as a couple in her article.
parked spot
New York, NEW YORK
The spot on street where George tries breaking up with Allison at the start of the episode, and later is successful when declaring “I’m gay! I’m a gay man! I’m very very gay! Extraordinarily gay! Steeped in gayness!”
Weinstein Hall
5 University Pl., New York, NEW YORK (map)
nearest subway: 8th Street – NYU (R,W)
Elaine later goes to explain the true story about Jerry and George to Sharon, but refuses to take her coat off in her office. Thank you to mhmaberry for flagging this was the correct location!
Martin Beck Theatre (now Al Hirschfield Theatre)
302 W. 45th St., New York, NEW YORK (map)
nearest subway: 49th Street (N,Q,R)
George gets tickets to Guys & Dolls, “a lavish Broadway musical…but its Guys & Dolls, not Guys & Guys.” The 1992 US Revival featured Nathan Lane, Peter Gallagher and Ernie Sabella, who starred as the naked rider from “The Subway.”
Berlin, GERMANY (map)
Jerry’s response to George encouraging him to “go along” with rumours that they are a gay couple: “Let’s see you in Berlin in 1939 goose-stepping past me – come on Jerry, go along! Go along!”
John F. Kennedy High School
99 Terrace View Ave., Bronx, NEW YORK (map)
nearest subway: Marble Hill – 225th Street (1)
Where the story of George falling on Jerry’s head in gym class happened, which was the catalyst for their friendship and part of their story to Sharon the NYU reporter.
INDONESIA (map)
Arguing about Elaine’s refusal to take off her coat wherever she goes, George claims “there are tribes in Indonesia where if you keep your coat on in somebody’s house, the families go to war!”
Pines Of Mar Gables, FLORIDA
Jerry’s parents discover the article claiming he and George are a couple, and Morty blames Helen for his supposed sexuality: “it was those damn culottes you made him wear when he was 5!”
St. Luke’s-Roosevelt Hospital Center (now Mount Sinai West)
1000 Tenth Ave., New York, NEW YORK (map)
nearest subway: 59th Street – Columbus Circle (A,B,C,D,1)
George goes to visit his mother after her fall from reading about George’s “outing,” claiming she truly knows nothing about him: “maybe you’re making porno films!”
Costanza House
Estelle ends up back in the hospital after again falling off her toilet and throwing out her back, this time from reading the article implying Jerry and George are gay.
Maps About Nothing. A global guide to Seinfeld. 
You are missing at least one featured location. There is a scene where Elaine visits Sharon in her NYU dorm room to convince her not to write the article but things go awry because she refuses to take her coat off.
So I did in fact have a listing, but after checking again following your comment I realize the split-second establishing shot is of Weinstein Hall at NYU! Thank you for catching this! I must have sneezed during that shot apparently.