My 3 are kept in the spare room and that room is where they have their floor time. There are no wires on the floor, and I put down boxes with holes cut in them to hide in, balls to push around and give them tunnels for them to play in. Oscar-Lemur and Elliot absolutely adore playtime as they don't live together yet (not yet sorted out the heirarchy...lots of rumblestrutting, shoving their butts into each other and from Oscar-Lemur, 'the yawn!' so they're not trusted to live together yet although they are slowly becoming the best of buddies.
Old boy George couldn't care less about floor time with the 2 young 'uns, although he does like a little mitheration from the anklebiter, Elliot, so they have a little playtime together a day. George, my oldest, and therefore dare I say it, my favourite, is allowed to come down stairs in the evening with me and play on the living room floor and sleep on my wooly snuggly rug and he looooovvvvveeees that time more than anything else in the world. He prefers hoooman company than that of those stoooopid babies (Elliot and Oscar)!