Definition of "SRO"

SRO

phrase
1. Initialism of standing room only.
  Quotations
  I know I'm the best there is But all they want is a show Well, that's all right, I'll be glad to oblige S.R.O., S.R.O.
  1984, “Merano”, Tim Rice, Björn Ulvaeus (lyrics), Benny Andersson and Björn Ulvaeus (music), performed by Murray Head, Ambrosian Singers, and the London Symphony Orchestra
  What a pro! Herc could stop a show Point him at a monster and you're talking S.R.O.
  1997, “Zero to Hero”, David Zippel (lyrics), Alan Menken (music), performed by Lillias White, Cheryl Freeman, LaChanze, Roz Ryan, Vaneese Thomas, and Tawatha Agee
noun
countable and uncountable, plural SROs
1. Initialism of senior-ranking officer.
2. Initialism of school resource officer.
3. Initialism of single-room occupancy.
  Quotations
  Freddie gave him the address of an SRO way uptown on 171st Street, room 306.
  2021, Colson Whitehead, Harlem Shuffle, Fleet, page 222