As mentioned a 2BR at any of the DVC resorts will sleep 8 - a few sleep 9. There is a king bed in one bedroom, 2 queens (or a queen and a double sofa bed) in the other bedroom, and a sofa bed in the living room. You'll also get a full kitchen as well as a washer and dryer. Old Key West has the largest units. There are also 3BR Grand Villas. Each couple would have their own bedroom in that case. There aren't very many GVs, and they are popular with the DVC owners, so renting points is pretty much a requirement is you want to try to get one.
Steve