I used to be abroad for a long time, where I met with name tags. Each participant had a paper label on his desk in front of him with his name of sufficient size. Our lecturer could always reach us by name and did not have to use the "Hey you there in the second row at the window". It was all the more important because it was abroad, and our names were hard to pronounce for the lecturer, and he could not remember them at the very first hour.
Later, as a lecturer, I used this trick. Today I lecture at the University of the Third Age and there is another time. But it can also be done manually. Just give the listeners the right paper and ask them to write their name. But everyone writes it in different styles and other font sizes. The result is not readable.
I designed a program that makes it easier to make name tags. It's just a PC and a printer.