There are a lot of activities in Pittsburgh that are free, or almost free - free days at museums, free concerts and films, free outdoors festivals, free cultural events ... . In addition to these (can't beat the price!), we'll post "almost free" ones where the cost is low (usually at most $5) compared to the fun that can be had.
We're always looking for more ideas. If you have one, add it to our calendar as a "suggestion" ... and let me know so that I can turn it into a Meetup event.