In TOW the girl who hits Joey (Season 5), Ross has just moved in ugly naked guy's apartment, he refuses to chip in 100$ for the handyman Howard (who was retiring) since he just moved in, the whole building hated him for that & think of him as a cheapskate.

In order to show his new neighbors how generous he is, Ross throws a party that no one shows up to -we can see him sitting alone & bored in his own party- once he turned off the music he heard people chanting Howard’s name then turned around (and before he went to check for it) you can see on the black fridge in the kitchen a reflection of someone’s arm cheering in the party that was thrown for Howard in the apartment across the hall.