I have a co worker who mentioned AARP discount for a hotel on a trip he took. I looked up age requirements for joining. Well, to my surprise, you can join at 18. Is AARP worth it? I am a veteran and think it said you get a deep cut on membership cost for that as well. I'm 47 and was wondering if it's worth it. I don't travel much, but never know if it may come in handy. What discounts and perks do you use most often?