That happened to me on a couple of club rides too. Two different guys about my age giving me tips as though it was my first month on a bike. Sheesh.
I had to finally tell one of them I appreciated his help but that I already knew all the stuff he was telling me. (like advising me how to cross RR tracks before we came to them, how to spin up hills to conserve strength....all stuff I already know and do)
You'd think they'd try to find out how much you know before trying to 'teach' you.