Plus there's less of a tendency for awkward, quiet moments as you get a break from eye-to-eye contact when you're actually climbing.
It's a hell of a lot of fun, keeps you in shape, gets you outside and away from the computer, etc.
Pretty much every major city, and many smaller cities, have local parkour communities. Just search Google for "parkour MY_CITY".
And if you live in Toronto, Canada, come join us at pkto.ca
I pay $60/month for climbing (in Maryland), or it's $16 to go once. Rental harness and shoes is about $9. The prices fluctuate depending on the gym you go to though. Mine offers classes sometimes too, so if you want to take those it will be more money, but by all means they're not required. Try to find a local rock gym; googling works fine and searching climbing forums.
I go with a few coworkers who also caught the climbing bug, there are also always regulars at the gym who you get to know after a while and I sometimes meet new people at the gym to belay me. (You can't really climb by yourself as you need a person to support you on the ground ['belay'] unless you're bouldering. Bouldering is close to the ground and is generally more inventive and harder as the problems (a problem is a set of hand/foot holds that you have to traverse to complete a route in bouldering) tend to be very technical. For more actual explanation on how everything works, wikipedia is a great resource, or alternatively, you can just contact me.
It's a great hobby, in my opinion. Good for physical development, good for meeting new people and very rewarding as you see yourself progress to harder climbs.
I'm seriously considering taking it on.