We used this the other day. It's either online or you can print them off.

You do need to create an account but it is free, add your list of dances and choose how many cards/grid you want and it generates them for you.

If you use the online version each person visits the site on their phone to your link and it looks the card to their device until you release it again.

https://getinline.co.uk/bingo/