The last time I had sex somewhere other than bed we spread ourselves out around the kitchen -- table, island, and floor. I preferred the table best, but was more orgasmic when i was on my back on the floor
The kitchen is second to the bedroom the best place to have a bent over the kitchen island quickie. I once wanted to take my wife on the dining room table but she wouldn't; said it was where we eat... In the end I did eat her on that heavy railway sleeper table.
The family room, on the floor in front of a warm wood burning fireplace, in the middle of the day in the middle of the week, before the kids get back from school. The hot tub is a great place for foreplay, but not practical for actual fucking.
"The Punished Nonpartisan" <- Extreme BDSM and humiliation story. Heavy on plot. Served on a plate of political drama with a side of domestic terror. Currently Free download.
Jocelyn the Wicked <- futanari, fantasy fan fic, and some tentacles that escaped the laboratory
The living room couch is perfect for such encounters. If I had a sturdier dining table I would enjoy it. Not inside the house, but I have made rather good use of the back deck.