Clients The Fabulous Thunderbirds do not use a set list for their concerts. Most bands do. Most bands decide what songs they are going to perform ahead of time and that list of songs is printed out and taped on the floor next to each musician.
A number of artists will use the same set list throughout a tour, changing out a few songs here and there.
Not The Fabulous Thunderbirds though.
Kim Wilson, the lead singer, takes the temperature of the room and calls out what the next song will be based on how the audience is responding. The next song could be fast, slow, blues, rock, one of their own tunes, or a cover of someone like Muddy Waters. The band doesn't know until Kim shouts it out.
That customized show is one of the reasons it is worth it to see The Fabulous Thunderbirds not just once, but again and again.
It is also a nice reminder to customize the experience for your customers whenever you can.