Does "free WiFi" ever work?

This happened several years ago when WIFI was pretty new. I was at Cabela's flagship store in Sidney, NE. The CG where I parked asked if I used WIFI, and when I told him "yes" he put me in a site near the office. The RV park was long and narrow. That was fine by me, but I wondered why, so I asked. He told me that a salesman stopped in and sold him the WIFI system. But people complained when they couldn't get connected. His CG needed repeaters. So I drove my toad around the park trying to connect with my laptop and there was a definite point when access was no longer available. So until he was able to get the proper repeaters, he asked campers if they wanted WIFI before he gave them a site.
At least I get asked now at most RV parks that advertise WIFI.