At our office agents volunteer for floor time. If a customer walks in or a call comes in, you get the lead unless they are working with a specific agent. We try to cover for each other in emergencies.
You can sign up for floor time 9-1 or 1-5, Monday through Friday and 10-2, Saturdays and Sundays. A customer actually came into our office from another company today because there was no agent in the office across the street. I know it's a little slow, but at least someone should be minding the store.
Personally, I always have work I can do and still do floor time. If a lead comes in during that time, it's a bonus.