Yes, I am a member of both Dallas and Red River clubs. I am also a casting instructor for the DFF, and I'm at most meetings. The youngest person that regularly attends is about 13 and there are some folks that are over 90.
There is a wide range of ages in the DFF. However, it seems that most people become active in FF'ing clubs at about the "empty nest" stage of life, so most active members tend to be older. But younger fly fishers are out there and they are actively fishing.
The next DFF meeting will be the first Monday in February and the speaker will be AK Best. This will be a good meeting, AK is a fly tying legend.
Come visit one of our meetings!