Sleep counts are promises. Keep them honest.
The listing's guest count is the most load-bearing number on the page. Every advertised sleeping spot must be a real bed a real adult would sleep in for a week — because in a group stay, someone will. Mixing bed sizes across rooms is a feature, not a flaw: a family with kids, a wedding party of couples, and a project team of colleagues distribute themselves completely differently, and a house with queens, singles, a double, and a crib serves all three.
Publish the bedroom-by-bedroom breakdown in the listing. Groups plan who-sleeps-where before they book, and the listing that answers the question wins the booking over the one that makes them ask.