For hockey, the Garden seats 18,200; for Basketball, 19,763; and for concerts 20,000 center stage, 19,522 end-stage. The arena features 20,976 square feet (1949 m²) of arena floor space.
There are 196 countries in the world today.
1380 people can be seated but another 700 can stand as well!
You would struggle to fit more than four fully grown adults in a square metre of space assuming they cannot lie on top of each other.
Noble men were seated in galleries and brought cushions. The poor stood.
Two people.
14,000
two
4 people seated on a row may have 4! = 4x3x2x1 = 24 different ways to sit.
3 people
Cellos require people to play standing up. Guitars are also easier to play while standing up for most people, as well.
3*2*1 = 6 ways.
The number of seated people that Rod laver arena can hold is 14,820.