One of the best things about Spain in general is that the people walk so much more than we do, and spend a lot of time out in public. A lot of this is due to the climate, I'm sure, as well as the fact that the country is old, so many streets were never meant to accomodate anything but pedestrians.
A lot of women still shop daily and on foot, because freshness and quality are biggies in Spanish cooking.
The existence of plazas, most frequently fronting the parish church and a government building, and outdoor caf�s, makes Spain one of the most perfect people-watching experiences you can have.
In fact, the paseo of old, with young girls and their chaperones walking in one direction, and young men walking in the other to check them out, was pretty much the only place besides church the kids could give each other the eye! Nevertheless, people congregate outdoors a lot even now.
One of the best people watching experiences I have had was in a small coastal town reachable by subway from Bilbao. I was sitting on a bench reading on a pedestrianized street. At about noon, the street started to fill up with families: kids, moms, dads, grandparents. They were walking, riding bikes, scooters, and skateboards(the kids, anyway, though I saw one mom on a scooter)
It was Sunday, so all of the old ladies were still dressed up from mass. They walked arm in arm up and down, chatting. There was a lot of happy noise washing over me, and I loved it.
At about quarter to two,
BOOM!they all vanished back into their apartments for the midday meal and I was alone again. Inspired, I got up off my wide American behind and walked around the town for a couple of hours myself.
Pack light, sleep cheap, eat well.