During the high season, there are usually one or more karaoke shows each night in Mazatlán. Most karaoke shows in Mazatlán will have both English and Spanish songs to sing. The shows operate in the same manner as karaoke shows in the US or Canada, i.e. you write down your song request, hand it in, then wait to be called up to sing!
For the 2018-2019 season, the hosts that have multiple shows are Roberto and his daughter Diana, and Diana Hawes(Robert retired this year). There are other hosts who only host one show a week. There are karaoke shows in the Golden Zone, Sabalo Country, Downtown/Old Town, and Cerritos The main restaurant/bars that have karaoke this season are Margaritas, Last Drop, La Catrina Restaurant and Cantina, La Fabula, and Friend's Diner. The Saloon which had a long running Saturday show closed down in the spring of 2017 so obviously there are no more shows there.
There is a complete listing of karaoke shows in Mazatlán (and all over the world) here:
Mazatlán Karaoke Schedule on KaraokeSchedule.com
There is a complete listing of karaoke shows in Mazatlán (and all over the world) here: Mazatlán Karaoke Schedule on KaraokeSchedule.com