Climbing Gym's are great. I am sure most rock climbers go to one when, for whatever reason, the can not climb outside. Gyms allow a climber to hone skill and stay in good climbing shape.
Find a gym near you!
Your GymPost your local or favorite gym as a comment and I will post it here.
Pennsylvania North Summit Climbing Gym , Wind Gap, P.A.
Colorado Climbing Gym of the Rockies , Fort Collins, CO
CaliforniaPlanet Granite Sunnyvale and Belmont,
The Rocknasium Davis, CA
Touchstone San Jose, San Francisco, Berkeley, Sacramento, Concord, and Marin, CA
City Beach Freemont, CA
OhioMiami U. Rock WallMiami University, OH
OregonPortland Rock Gym Portland, OR
Brazil Via Crux
is a video of SP'er JerseyJosh bouldering at North Summit.