Publix offers a senior (age 60) discount on Wednesdays. I had no idea until they asked me if I qualified. I said, "Ask me next year!"
Of course, by the time I qualify, I'll hopefully have some of the vultures moving out of the house.
On principle, I won't join AARP. They're too political, and my data is more valuable to them than the discount is tp me. FTR, this isn't a comment about what they specifically support or fight against--I just figure any organization made up of thousands of people is never going to represent the viewpoint of all of them, and so should stay out of politics. Seniors don't vote monolithically--neither does any other age group (or ethnic group, or educated group...).