It depends on what you mean by "other people." All but one of our children still live with us, so of COURSE we have sex when they are in the house.
As for "other people" you mean GUESTS, house guests, or dinner guests or neighbors and the like. HELL NO! I love sex, and although I don't find it "sick" (as your poll suggested) I think it is disrespectful to be going at it, while you have houseguests. With the exception of long term houseguests (more than a night or two) then we would keep it down.
As for roommates, I had them in college and I would NEVER have sex with them in the room. One of my room mates did that, and I found it not only disrespectful to me, but aggravating. IMO, it was showing off "OOO, I'm getting laid." When room mates are in an other room, maybe, if we kept it down. No screaming "Ride 'um Cowboy!" Spanking or other loud activities.
Sex in someone else's house? It depends, if it was a vacation scene, where we were to be there for days on end, probably, but quietly. ONE night, I think we can wait until we get home. And My Man hates people, so we get very few overnight at friends' homes situations. We did years ago, and no, we never had sex in someone else's bed or home.
When one of my kids is having a sleepover? NO WAY! I'd like my children to keep their friends and I don't need reports of MY sexual activity going home with my kids' friends. It's only the discreet thing to do.
Adults can wait until dinner guests go home, and same room room mates are not IN the room, and kids sleeping over go home IMO. I think the respect I have for my friends, my husband and myself precludes having sex with other people, who will be leaving within a few hours anyway, in our home.
We ARE adults.