@Jo-Anne27 Yes, I thought about that, but you mean like a bunch of 18 or 19 year olds or a couple with kids? It would be rare you would get a couple with 8 kids. The problem is, when you list the total guest max, there's no way to break that down and specify how many adults and how many children.
If you're talking about 10 young people, like in the 20 year old range, that's kind of a recipe for a party scene.
It isn't so important whether Airbnb says you can list it as 2 bedroom, it's, as Lisa points out, that you don't want guests complaining that there wasn't any privacy and that the 2nd bedroom wasn't really a bedroom.