At hotels, I do not usually have breakfast. When I book a hotel that is 'Bed & Breakfast' I do not ask for a rebate as it is my choice.
I endeavour to book a hotel on a 'room only' basis, on the offchance that a hotel deal may be cheaper, or the same price, including breakfast then I shall book and endeavour to set my alarm clock accordingly but it is not a term nor condition of my staying at that hotel.