I am active in another forum that has had as many as 786 people on at once. I see about 4 or 5 people listed as being in the chat room at any given time.
If you are concerned about kids getting in, that would mean someone would have to monitor 24 hours a day, 7 days a week for limited use.
I have to edit my posts about 4 times just to get them to make sense, I cannot fathom being in a chat room. However, I just celebrated the 41st anniversary of my 10th birthday so maybe I am just a crusty curmudgeon.