If you can narrow it down to specific properties (to the point where looking at each individually won't be onerous), just go to the actual property websites and look at the room types. The descriptions should be pretty explicit about the furniture (e.g. 2 queens, king + sofabed, etc.) and in the details it will say how many it sleeps. A combination of that latter point and you using your judgement on what furniture can hold what people will probably be more reliable than using the algorithm's judgement on a hilton.com search.