All of mine are pretty busy this week, but I'll try and think of something your pups can get involved in.
My only suggestion would be a) make your open posts set at the same point as other posts around it, e.g. not a Friday when most other characters are still on Monday or Tuesday in the week. and b) make them places other characters are likely to be. There's several bars and clubs owned by characters in-game, choose those rather than random locations in DC that pups don't have any reason to wander into randomly.