standing room
noun [ U ] uk/ˈstæn.dɪŋ ˌruːm/ us/ˈstæn.dɪŋ ˌruːm/
（体育场、剧院、公交车等中尤指座位已满时的）站立空间，站立位置
space in a sports ground, theatre, bus, etc. where people can stand, especially if all of the seats have people sitting in them
All the seats were gone, so there was standing room only. 当时座位票已全部售完，只有站票了。