Michael Schoch, Answers questions on Noodle
Other students have written that sporting events, group activities and Christian functions are some of the most popular activities at Grand Canyon University. This of course doesn't mean there aren't activities off campus, but it at least sounds like students stay pretty involved with university-sponsored programs.
The school also has what sounds like a strict no alcohol policy, which may or may not actually restrict the amount of drinking that occurs. If you're not able to get in touch with a current student at GSU, then you may want to set up a time to visit. You can call the school at (800) 800-9776.