Face characters work all day, most days. If you're doing meet and greets in a building, you're on for 45 minutes and then take a fifteen minute break. If you're doing meet and greets outside, you're on for an hour or so and then you get a longer break before going back out. If you do a dining location, you work during the meals and then break inbetween. Reguardless, you do all of the work in that location for that day.