unless you could fit a bunch of people on the floor.. but your right, i think MGM in particular is pretty strict on how many can stay in a room. at least with Hawthorn, they didn't care much and you could get up to 6 keys since there's sofa sleeper and everything in there.
Hawthorn is so close to MGM, i'm surprised nobody's said they're staying there yet! their rates right now are $129/nt...other than that, Tuscany Suites is another suite type environment, but it's closer to TI and about 1/2 mile off strip.