When you're in Pittsburgh you have to go to Pamela's at least once. This is probably the least busy of the several locations so I recommend this one over any of the others. It's street parking but luckily on a Sunday it's easier to find.
The crepes are fantastic (banana walnut yup) and I always go for the corned beef hash. Their other egg dishes (especially the one with chorizo) is very tasty.
Just remember - Cash only.