We have one dying strip mall in this town and my friends and I just go there to wonder the few open stores left. We don't by anything we just peruse the places, make small talk with the shop keepers, sit and chat about the closed down shops on the benches.
I also frequent the antique stores, and just look at the history thats brought in. Sometimes the store keeper drops by while you look and offer facts on some of the items.
They get me out of the house and keep my mind off work and they're sometimes more accommodating than a coffee shop.