Wow! I feel much better now. There are quite a few players here my age even though the majority is obviously below that. There were some really good responses to the question here. I love the game and I love my guild but I do believe there is only one other adult, two counting my wife, in my guild as far as I know, but it is a great guild so I hang in there.
In fact there are probably four or five characters that keep me in the guild including Savs, Andrew, Ben, and perhaps Alex. were it not for them I would probably seek a guild with people more my age but my four characters, three really since my wife uses one of them most of the time, they have been in four or five guilds and this one is the best by far just because of Savs, Andrew and Benjamin.
Then again, just my opinion and I might be a little biased.
I'm sure there are many other great guilds out there.