I agree Momof4 - I do not charge anything for a pre-booked space, aside from the two weeks security deposit, unless it was an already EMPTY space in which case it is no longer prebooking but rather 'holding' a spot ... if another client is currently sitting in the space I would not feel fair 'double charging' for the space cause IMO if they are paying for it they should be able to USE it if needed and that would not be possible if I am at my 'max 5'.

This is one of the reasons that I rarely allow part time children to pick up extra days when I am 'full' because if someone called in taking a 'vacation day' and something changed and they needed to send their child after all I could find myself in a predicament because the client whose space it is contracted to is entitled to use their paid for space and the client I offered the picked up day to made plans to have that day of care and so forth