What is collective noun for group of crossword puzzlers?

There isn't a widely accepted collective noun for a group of crossword puzzlers. However, here are some options you could consider:

Humorous:

* Grid Grinders

* Wordsmiths' Guild

* Clue Crusaders

* Square Slingers

* Brain Benders

Formal:

* Crossword Enthusiasts

* Puzzlers' Society

* Word Game Players

Ultimately, the best collective noun will depend on the context and the desired tone. You can also get creative and come up with your own!