How to make a room on multiplayer

how to make it? example :

room 1 capacity = 10 people

room 2 capacity = 20 people

and how to make the counting of much people in that room?

example :

room 1 = 3/10

room 2 = 14/20

Thanks..

Use 'auto join room' with a max peer count. To display a list, request a room list.

Ashley i'm still learning about this,is there any tutorial to make that?

anyone can teach me please?