I think one of the bits I liked most was "Romeo (Retired Old Men Eating Out) Club" - looking at its website it seems like quite a large thing over there. I know that my Grandma goes to something similar (restricted to just tea and bingo), but it makes me wonder if a similar organisation exists in the UK; a lot of the older folk I know just aren't very social any more, simply due to the fact that their social groups have died off or are spread out and have restricted travel options. Social interaction seems such a huge part of our existence to be missing for any individual (unless that's what they want of course).
Again, anecdotally; I've found amongst the older folks that those engaged in discussion and interaction keep their wits about them longer/easier than those bound by isolation.
Anyway, enough babbling on - time to go do some research.