Here is the demo for Rocket.Chat
https://oasis.sandstorm.io/appdemo/vfnwptfn02ty21w715snyyczw0nqxkv3jvawcah10c6z7hj1hnu0
you can login as demo and after that go to administration to play with it. I hope it would give you the general idea of how the admin side looks like.
