Where We're Going We Don't Need... Eyes

Did you know blind people can type? Neither did I. The gate agent handed me a blind lady the other day, and as I passed her in flight, she had what looked like a black tackle box on her lap. And it looked like she was typing, so I asked her what she was doing. Yup. Typing. A braille typewriter. She pointed out the row of spaces where could feel the letters you'd typed... the only way I can think to explain it is that each space is a braille letter-sized grid of holes, and braille pokeys pop up through the holes in different places to make different letters in the same space. Like whack-a-mole, in a literary sense. It was easily the coolest thing I'd seen all week.
Tell you what I've always wondered though... they have braille on hotel room doors, but if you can't see, how do they expect you get to the hotel, into the elevator, and down the hall to look for the thumb-sized braille adrift on a six-by-three foot door?