It makes sense.
Personally, I've had little or no success selling domains that use "2" for "to" or "4" for "for", although they sometimes do sell.
The issue for me with this one is that I hear people say "book a room" but not "rooms to book". As unusual (not unnatural, but unusual) as "rooms to book" sounds to my ears, the singular "room to book" sounds more so.
Probably not a sale in its future. But if you want a list price for Sedo or some place, try something at or below $800. That way, maybe it will move in a year's time if you're lucky. Above that, any buyer has many better options.