What do you mean by room?
If you upload your application on Furioos, you will be able to share it by link or embed.
Each time a user starts a session, a new server is assigned and the app is started. If no servers are available the user remains in the queue until one is ready.

There is no limit of simultaneous users on a Furioos account, the only limit is related to hardware availability. If 200 users want to get access to an app at the same time and the hardware is available, they are able to stream your application. Otherwise, they will be in the queue until the hardware is ready.

To guarantee the availability of the slots, you need to have an Enterprise account on v1.0 (available next week). With this plan, you get the pre-allocation feature that allows you to reserve hardware and get fast-launch for your app.