Same. When my dad turned retirement age I would make absolutely sure every waiter and cashier knew he was a senior. I'd loudly ask if his senior discount had been applied. Ah, the sweetest of petty revenges.

(Karmic backlash: my kid has always been tall and strong for his age. I lost out on years worth of "kids for free" discounts. The ONE time I tried to eek him under an age limit he quite expertly shut down any shenanigans by stating his birth date, age to the day, and a proclamation that he would be ordering from the non-kid menu anyway, so it didn't matter. He had just turned 6.)