Glee, here in the old folks' home there are some unwritten customs that have been very helpful for me. The biggest no-no is saying negative things about people. The rule at our morning coffee klatch is "no politics, no religion and no 'organ recitals'". We are all getting older and you don't get to this point in life being totally healthy. It's really quite amazing how "up" the atmosphere is here. We're at a point in our lives where we are truly grateful for whatever we've got. Gossip is frowned on and what there is of it is pretty tame and mostly not about people.
We don't generally hold onto resentments and that's a great way to live :-)