Oscar tells Felix he's never been to the Statue of Liberty, but he took the Princess of Lichtenberg (Jean Simmons) there in the third show of Season 3.
When the subway train is cruising at the end, and especially when it stops at Times Square, everyone on the train just stands around easily and casually, as if they are not on a moving (and stopping) mode of transportation.
Felix laments that he won't be able to have sex (clearly implied) with Miriam for two weeks since her mother is coming to visit her. Totally disregarded is that she could easily come down to Felix's room, especially since also at the time, Oscar was going away on vacation.