I've done it before. We started at around 6pm doing a few friendly calls (that took maybe an hour each) then hitting landry mats and other businesses then 24 hour places. It was super easy. We even drove to another city about an hour away, stopping at truck stops along the way.
Got back met with the regular group for Sat FS, then made some calls in the afternoon. I think we ended up getting around 20 hours. I was aux pioneering that month so it really boosted me making my time. It was actually much easier than knocking on doors.
The elders (I was a MS at the time) critized us but one of my friends had a yearbook where this practice was related. He asked the elder if that elder was questioning something the "slave" encouraged. LOL - you should have seen his face.
It's never about reaching people, it's always about "counting time".