What lot type did you use for your community lots? If you didn't specifically change them from the default, the default is residential and few NPCs will show up there.
Okay, go into Build Mode on your community lots. In the upper left hand corner, it'll show you the lot type. That looks like this (from Crinrict's help blog; this isn't the same problem as in the article but it had the best picture to explain what I mean):
You want to make sure that the library has a lot trait of Library, etc. If the lot type is Generic or Residential, visitors won't spawn.
I hope that helps!
Okay thank you so much, I'll try it next time I play and let you know if it works, hopefully it will!
