@June@kitty.town You can just ask one of the workers at the theater, they kind of just hand it to you and then when you are done you give it back.
The ones I used screwed into the cup holder but could still be used, but the words are on a nice LED display behind a prism so it is easy to read. At least the ones I used you can adjust freely for any angle.
@June@kitty.town The theater I go to has these https://www.qsc.com/solutions-products/accessibility/usl-ccr-100/?L=0 .
But there are other ones that do glasses, although since I wear glasses I dislike those.