In Asia where I'm usually travelling, kids under 7-8 don't usually seem to count against room occupancy.
I booked a Hyatt in Tokyo recently, and upgraded to a suite. At first they told me no suites we're available the whole year. Then when they checked with the property, they said to just remove the toddler from the reservation. Then all the suites opened up.
Unless there are fire code issues, I'd definitely think properties would cooperate if contacted.