running around a large city at night. urban frolicking usually involves running across large and busy streets while there is a break in traffic. It usually occurs because you (and your friends) are looking for something and can't find it OR you just want a rush.
Person 1: where's the nearest bus stop?
Person 2: It's near the mall.
Person 3: we're going to have to do some major urban frolicking to find it.