I would recommend that you request info from a couple different senior living facilities in the Dallas-Fort Worth area as some of them do not always list all of their amenities. I suggest you start with this senior living community: Parkview in Allen. Not only does Parkview list patios in their amenities section, but also have a great list of activities for seniors.
Here are a few other active senior communities I would recommend that you contact to see if they have what you are looking for:
