Answer: Police Station
There are several changes with "Officer Krupke" in the 2021 film. One is its placement, immediately after "America"; in the 1961 film, it is after "Tonight". In the 1961 film, Riff (Russ Tamblyn) was the lead singer; he is not even in the 2021 version. And the 2021 version takes place inside the police station, where the cops are questioning members of the Jets about the rumble.
In the 2021 film, "Officer Krupke" is performed by Diesel (Kevin Csolak), Big Deal (John Michael Fuimara), A-Rab (Jesse LeProtto), Mouthpiece (Ben Cook), Snowboy (Myles Erlick), Baby John (Patrick Higgins) & Balkan (Kyle Allen). It is actually a significant improvement of the 1961 version of the song.