In ReaNINJAM, the "Users" column tells you something like "1/8:Jambot" or "7/10:Bernie,EXHALE,HammerOn,marcello,Michel_bass,nin bot_,oio". The "1/8" and "7/10" is how many users are connected "/" (out of) how many users can be connected -- to that server.
Many rooms have a bot streaming - that's the "Jambot" or "ninbot_" above. The room welcome message should tell you where to go if you just want to listen, e.g.
https://ninbot.com/radio/2050.