Since watching the show, Ive heard so many gimmicks used with "ray" in it like:

McRays
Raywitness News
K-RAY
St. Ray's Hospital
and many others.

What are some other "ray" gimmicks?

Gosh, there are TONS. Go to Matt Frier's MF website, and he has a page all about that. :) It should be easy to find through a search...