Clubbers live all over the region, with the biggest concentration in DC.
Denis Crean & Anne Whalen McClendon(spell?) are good private swim coaches, as is James Chu & Cat Myung with the club.
You can rent race bikes at WheelNuts Alexandria. The area bike shops–Big Wheels, Spokes, Contes’s, Trek, etc.–are all good for shopping for bikes. PeasantMan is a good local fun tri for getting back into the sport.