Anybody who has stayed with us, before the room or after it, can leave bags in the locked room behind the desk for as long as they need on that day. There is no charge and there is no ticket to buy.
That covers the awkward shape of a transit day: check out at eleven, flight at midnight, thirteen hours with a suitcase. Leave it here, go to the beach, come back.
There is a shower by the laundry you can use after checking out, free, whether or not you booked a day room.