When I go to the programming forum, the banner says "Join the Programming Group Chat - 188 members are chatting as of 20 Hours Ago", yet when I go there I see Dani was there Friday morning and bookday502 was there Dec 7. Where exactly are these 188 members who were chatting 20 hours ago?

188 members are enrolled in the group and will receive a notification if you send a message to the group. Sorry for the misleading wording. 188 members aren't actively sending messages. 188 members are "listening in" in the chat room.

I thought the wording made sense because when I think of participants of a chat room, I think of how many people are in the room listening. Not necessarily how many people have spoken up over the past X minutes/hours.