I'm 74yo, ride a 1999 Lemond Buenos Aires, and I will ride with you any time. If you get to Colorado, look me up and I will show you a great trail system.
I too have been snobbed by the guys in the team kits, but I just consider it their loss. They are missing out on all the accumulated experience of 74 years and I might even have something to offer them. Their loss, not mine.
So, think of yourself as valuable, find some non-snobbish bicycling friends you enjoy and bicycle to your heart's content. There are some great bicycling folks out there - find them and enjoy them.
And you might want to stay away from the fixie forum.