I want to acknowledge the persistence of my friend April Strom and the Teaching for Prowess Team. Even though it seems nothing was going right this morning, they made things work.
Pivot number 1: The hotel wouldn’t allow anything on the walls. No tape, no blue tape, no static clings, nothing. The plan was to create temporary “vertical nonpermanent surfaces”, which became impossible given the hotel restrictions. Oh well, horizontal would have to do.

Pivot number 2: Just as she was starting to assign a task, the lights strobed and the fire alarm dinged its warning.
The sound you hear in the recording above apparently means “stand by for details.” A double bell would mean “please evacuate.” I was not familiar with the distinction and so learned something new today. Thankfully we were near the ground floor. I heard that some hotel patrons walked down over 30 flights believing they needed to evacuate.
Regardless, it was not possible for the session to continue until the situation was resolved. That just meant April and friends adjusted on the fly when we returned 20 minutes later.
Well done. That is what I call teaching with prowess! What an exciting day.