I did a course where they played the same playlist before the next part of the course after the break.

The last two songs were:

Danger zone

We will rock you

Chosen for their relative lengths!

You know when danger zone is on there is one song left, it gives about 4 minutes for everyone to kinda get ready, finish coffees etc.

Then we will rock you is short so once everyone is kinda ready it’s not long before the lesson starts.