All you have to do is ask them if they have an ADA kit. When I rent a room in New York City, they always made sure I got one. It usually included door knocker sensor, alarm bed vibrator and a TTY. It also would include a fire alarm alerter, if the room isn't installed with one.
I remember when I was on a field trip with my class from college, my professor requested them an ADA kit. They said they had it. Then I hooked the alarm up and went to sleep. I never informed my classmates about it. When the alarm went off, the guy who slept in the bed with me jumped up and ran to the corner. It was hilarious, I had to laugh sooooo hard.
On that same field trip, we stayed in another city, and they gave us a room with a TV that wasn't captioned. My professor was funny and decided to give the hotel a hard time. They ended up giving me my own room! It was nice having the whole room to myself!
