I catch the train to work, and from the station to the hospital, it is a good 15 minute walk, and uphill.
I don't have lunch during my lunch break, so I will typically either walk downtown, or go for a walk in the County Park near the hospital (it really is lovely, Langdon hills with loads of bridle paths, rolling hills and wooded areas), and I have quite a few people at work that I will walk with.
I used to run at lunch, but I have been suffering from Plantar's fascitis (sp) lately, so I have to take it easy.
We do all of our grocery shopping without a car, and while it is only about a twenty minute walk down town, it does increase the effort by carrying a load of groceries back (the same with shopping during my lunch hour).