I haven't retired. But I am one of those people who enjoy truly doing nothing. Currently my weekends go off in lazing around, unstructured. I surf internet, watch TV, play with kids, go to parks and just chill basically enjoying the fact that there is no structure to my day.
When I hit my FIRE in say 5 years, this is exactly what I plan on doing. I plan to have few templates of days and just pick one of those and go with it
Day Template 1: Breakfast, Walk in Park, Lunch, Dave&Busters, Movie, Dine out, Browse, Sleep
Day Template 2: Breakfast, Walk in Park, Mall, Shop and eat, Barnes & Noble, Back home, Coffee, Dinner, Browse / chat with DW, sleep
Day Template 3: Breakfast, Coffee, Browse, Lunch, Ymca Swimming, Mall, Dine out, Browse, Sleep
Day Template 4: Breakfast, hike, lunch, browse, dinner, browse / read, sleep