How many peopole can connect at the same time TLRM3020

Hi,
How many peopole can connect at the same time to a TLRM3020 running piratebox?
Will a bigger router allow more simultanious connections?
Whats your recomendation when you want to use this with 20+ people?

I just finalised the first box and its running great. Thanks to everybody working on this great project.

It will be used for a project called "teachers on the road" where language courses are given to refugees here in germany.
I will do a seperate post about this project soon.

Thanks for your input

Olaf