Socialism
This should help answer your question :) http://forum.ea.com/eaforum/posts/list/9387348.page
Forum Discussion
You just have to be friends with them, visiting doesn't matter.
I only every visit during the events (H'ween, Christmas, Valentines, Whacking Day).
etc
etc
etc
I only every visit during the events (H'ween, Christmas, Valentines, Whacking Day).
etc
etc
etc
