Dude, next monday I am down if you are.
Also, my rec center has a pretty nice rock wall that I see people using allot. You can rent harnesses for a buck. This might be an option too somedays.
Trails Recreation Center
16799 E. Lake Ave., Centennial, CO, 80015
(303) 269-8400 - Venue Website
34 foot, natural looking, free standing wall climbing tower. Inside public recreation center. Top roping and bouldering wall.
Where abouts do you live?