There were other places to work out - our University had a track and a "gym" which was more rudimentary than many of the gyms I go to in rural Africa. Then there was also a park near our house, where my roomies and I did some workouts outside (pushups, jumping jacks, our old cross country stretches) - we scandelized the locals. Working out is not something you do in public in Spain. Ever.
One of my roommates joined a local gym (it was too expensive for me), and she would take the aerobics classes. She always came back with hilarious stories of women in full makeup and street clothes doing these dance moves. Em is such a good sport- it's tough to take jazzercise in a foreign language, but she was totally faithful.
My last run up las colinas was (thankfully) right at the end of my program - it was midday, and I was home early because I had a class cancelled. I was home just before lunch, so I decided to go for a run - not my normal hour for running, but no big deal, right? wrong. After getting followed up the block by 2 policemen (gracias, i felt so safe) - I rounded the corner, ran up the first hill, and immediately was overlooking about 17 shady characters on the next hill below me. I couldn't tell what they were up to, but they did not look friendly. I was sooooo disappointed that my spot was actually miscreant meetup locale, and I never went back.
The other workout memory I have from Spain is when my roommates & I decided to create our own workout routine in our rooms. It was a pretty intense couple hours of running in place, some pilates moves, lots of jumping jacks, pushups, and situps. Sadly, we were discouraged by our Mama (who by the way thought we were loonies) telling us that if we jumped, we would 'disturb the neighbors.' We had to keep quiet, but we were still really good at figuring out exercises to do!