I learned about this from my days as a landlord.
No. Nein. Nix. Nyet. Fuggedabout it.
I host rooms in my home. The rates are very inexpensive. I allow one person per room, period. There are no visitors. no boyfriends, grandmothers, cousins twice removed.
It's true - my insurance won't cover it. That's all I need to say. I also like my privacy, and so do my other guests. But there's more, as the other posts indicate.
"My friend wants to use the bathroom. May they have a drink, please? Gosh, they're hungry. It's awfully late - can they stay the night? He's just here for 2 nights, honestly. Mind if I borrow some extra towels, blankets, and a mattress for him? Sorry he's hung over and running around in his underwear, but he really meant no harm.....yeah, I guess we did chat till quite late. I am so sorry we bothered the other guest and now they are leaving, but we really did try to keep it down."
Been there. Done that. Enough is enough.