There are some adaptations needed. I placed a lockable gate beside the showcase to keep sims out of the kitchen area. I hadn't yet hired anyone to man the cash register.
Imagine my surprise when I went in to do a live test that the kitchen was full of people (I have it set as a hangout). I'd forgotten about the back door and that there is a space in the ice cream shop that will allow a sim through and through the doors into the kitchen.
Not going to worry about it now though because the bakery was the last of my community lots to be recovered. Now on to the 28 residential lots and the zillion bits of CC to be repaired or replaced.

Of course my pretty walls are gone

and I have to try and recreate them. Glad I have screenshots of all the houses.