Welcome to the forum look. I definately think that what you're looking for is more along the lines of swingers. There's a definate difference. My wife and I started out by trying to spice things up in the bedroom. So we'd bring the occasional woman in and we'd all have our fun. Then, one day it happened. We fell in love. That's being Polyamorous. Since that point we've realized that what we wanted wasn't just sex, but to share our love with someone and have the same in return.
Good luck and please feel free to bounce ideas and ask questions off of the members of the forum. Look forward to hearing more!