Curling is alot of fun, and really not that hard to learn how to do. For sweeping it's liek learning to skate for the first time again, because of balancing on a single plastic pad on the ice. The other big thing to learn is proper form when throwing the rock, aiming it, and turning it the right way.
Problem is getting good at it;, again, much like bowling.
I learned how to curl in a prarie town that grew from 1500 to 2000 in 5 years (Carstairs). When the rink was first built soon after centennial, the pop. of the town wasn't much more than 1000.
So based on that MetroVan should have 2200 rinks.