standing room
noun /ˈstændɪŋ ruːm/,  /ˈstændɪŋ rʊm/
  /ˈstændɪŋ ruːm/,  /ˈstændɪŋ rʊm/
[uncountable]- space for people to stand in, especially in a theatre, sports ground, etc.- standing room for 12 000 supporters
- It was standing room only at the concert (= all the seats were sold).