Hi, the game is very nice but i think there's a bug that doesn't allow me to switch workers between buildings
If you completely unassign the worker it should work, here is a solution from discord:
Unassign the worker from every building she's/he's in. If the worker, let's say in your case, is both in the restaurant and the adventurers guild, unassign the worker from both, then assign the worker to the building you want. I've encountered that as well.
I have already fixed the issue for next version. But for now if you unassign first and the establish the job it should work. I will post soon the fixed version here too, you have it in discord already.