I have a fabulous flat being centrally located, it’s understandable that friends love coming over just to hang out. But since listing the flat, I’ve avoided having people over. I’ve always told guests where there may be a conflict and invited them but, what about friends coming over to, say, watch a movie or, to enjoy a meal? What’s the protocol? Am I doomed to never have friends over a few hours while I’m hosting a guest?
I regularly meet my students at the place while hosting (two different rooms, of course), and have never had any problems with airbnb guests, @Stevie-J0. You're the owner, you pay the bills. As long as you don't breach the contract - quiet hours being the most important - the guests should be fine.
I host a single guest in my private bedroom+bath and like you, my place is well situated for my friends to gather as a group to hang out. When I have friends over I make sure they behave and not go near the guest room and bath. We keep things as low key and quiet as possible - no loud music or parties, and I try to limit the frequency of having people over to no more than 3 or 4 times a month, and only on weekends. I usually let my guest know in advance that I might have a few friends over and if they are home I often ask my guest if they want to join us for a beer or late night snack - I haven't had any complaints yet. I think it depends on how you handle guest expectations. My friends have actually started to look forward to meeting my guest when they come over and most of my guests have also seemed to enjoy meeting a few of my friends.