Aria seems to have gone for as many electronic gadgets as the architect could find. Their rooms open with this card which you just wave at the door to gain access. No magnetic stripe and no slot in the door.

The lights, television, music, and drapes are all controlled electronically from either wall panels or a touch pad on the alarm clock in the bedroom. They program it so when you enter the room for the first time, the drapes open, the lights come on, and the sound system plays music! It takes a while to figure out all the key sequences and I was never able to figure out how to do some of the things a guest might like to do. They have also installed $3,000 toilets from Japan that take care of the end-play. You can control seat temperature, water temperature, and air from a cordless panel on the wall.

If you use the alarm clock in the bedroom, you can program it to play music over the TV and bring up the lights or open the drapes when you wake.

There is an elevated train that runs from Bellagio through Aria and Crystal to Monte Carlo. There are a couple dozen pieces of original art and sculpture scattered around the property, including a cast-silver replica of the Colorado River hung above the registration desk. It must be 30-40 feet long!

Anyway, I have a couple of extras of the brown room key shown below to trade for room keys or slot cards I don't have. It's hard to capture on the scan, but there are four diagonal stripes across the front which may or may not have something to do with the RF system that opens the door.