Hi ,
You had a workout planned at 18h.
A meeting runs over.
Your blocked 60-minute window is gone.
You won't make it.
Guess that's it? It's all-or-none?
Ganz oder gar nicht, like we say in German?
But:
You may still have 5 (or even more?) minutes after a call, while dinner cooks, or after getting home if you're coming from the office.
Use that slot for doing 1 hard set. If you have a little longer, do another. Takes you ~5 mins.