Its good you are checking before jumping in. I would also suggest googling the room you are thinking about joining and look for reviews. Keeping in mind with trading I assume there are going to be more failure than success stories so there might be more sour grapes reviews. There are sites that have a large number of reviews that are very in depth.
All that being said, I was in a trading room for a decent amount of time. I thought being able to watch someone trade would help me. Unfortunately the site I was on was popular and with hundreds of people watching and asking questions my questions went mostly unanswered as did potential trades. In the end several days would go by with no trades but a lot of good conversation. It began to look like the operator was just trying to run the clock out with questions, economic news no trading times, and things like that.
Ask the room operator if they have statistics of their P/L. Do they have a bunch of "courses" or indicators available? If so their room might just be an infomercial for their other merch.