Much of this rockin’ Blue Room’s atmosphere can be attributed to what’s located outside the space rather than what’s inside. A 4-inch-thick piece of Plexiglas allows color-changing fiber-optic lighting installed throughout an outdoor hot tub area to spill into the 406-square-foot entertainment room. Bouncing off the walls of the tub, the evening lights cast an ocean-blue hue—or any other color desired.