I was in a concert hall yesterday and spied two APs in the ceiling, practically on top of each other.
![]( https://www.ispywifi.ca/2016/03/19/free-wifi-competition/images/img_2061_hud38177be6cfed83f2fe67e6a3fa1620a_924834_1200x0_resize_q75_box.jpg )
On the left is an Aruba AP from TELUS (their TELUS Direct WiFi) and on the right is a Cisco AP from Shaw (their ShawOpen WiFi).
Anyone want to bet they totally worked together to avoid co-channel interference? 🙄