there is, in theory, a green dot on the avatar of people viewing the page but I've seen it show people online who are not online. /shrug. All 59 people are signed into the room. Many people, like myself, use an app so we can see messages even if we don't have a green dot. I have gitter installed on my phone for example. Yesterday I wasn't chatty as my wrist has been bothering me, so typing was a no-go.