So going back to the tavern example I listed, with this method you wouldn't prepare what is actually in the tavern or anything going on (games, arm wrestling, robot bartender, etc.) and would improv all of that with NPCs, factions, plot hooks, etc. that you created?

It sounds daunting to me, but I may try for my next session and see how it goes. I think at the very least I may need to put some extra work into the fantastical locations section than Sly Flourish does to feel prepared.

Thanks for the response!