Living in a New York City apartment for more than a decade before moving into my first house has taught me a thing or two about squeezing a sofa into a small space — as well as coaxing it through narrow hallways and tight corners to get it there. (Who doesn’t remember the pivot scene from “Friends”?) And no, I’m not talking about dorm room-ready futons but full-fledged sectionals and roomy loveseats.