I've been going thru all the groups and posting like this on the ones that the moderator hasn't logged in for a month or more. Happy to see you're still around.
To get groups going takes some work. You can send messages to those who you think might be interested (see the new member search feature), post an announcement in the Forum, start interesting new threads, add content (announcements, upload an group avatar, upload videos, add polls, and weblinks), etc... Check out some of the other active groups to see what they are doing: