Starting easy is definitely sage advice, but I like recommending bouldering for the simple fact that you can just go. You don't have to start by scheduling ahead and paying for a class, coming back the next day to get a belay card, and then finding a partner with an agreeable schedule (or scheduling and paying for a gym-staff belayer).
Most gyms are catering heavily to beginners nowadays and offer tons of beginner problems. If you've never been bouldering before and curiosity strikes on a Saturday morning, you can literally drive to a gym, sign a waiver, rent shoes, and start climbing the walls, usually for about $25 or less depending on your location.
Of course, this isn't without risk. If anyone reading this decides to do it, take at least a few minutes to learn the gym etiquette and start slow!
Most gyms are catering heavily to beginners nowadays and offer tons of beginner problems. If you've never been bouldering before and curiosity strikes on a Saturday morning, you can literally drive to a gym, sign a waiver, rent shoes, and start climbing the walls, usually for about $25 or less depending on your location.
Of course, this isn't without risk. If anyone reading this decides to do it, take at least a few minutes to learn the gym etiquette and start slow!