Sister's Sludge Coffee Cafe
3746 23rd Ave S, Minneapolis, Minnesota
100% positive
Directions: From front entrance take a right past the bar, then left at the hallway.
Comments: There are 2 separate unisex bathrooms, each with a changing table. They have a key that is kept by staff, but the baristas/bartenders are friendly, and in my experience will let non-customers use the bathrooms, and do not keep track of the keys (sometimes they are just out on the bar for people to grab).