THE SIMS 4 DINE OUT GLITCH

First, as Crnrit suggested, move all of your employess into a house to prevent them being culled each night.

Now that you have them coming in every time you open, if one gets stuck and can't move, do the following:

Press CTRL+SHIFT+C all at the same time.

Type TESTINGCHEATS ON

Press ENTER

SHIFT+CLICK on the stuck sim and choose RESET

See if that lets them move again. If not make sure the path to thier station is not block and the station they need works. You may need to sell and rebuy the station if resetting the sim does not work.