Fewer people are gaming now than in the past, although people that did not plan to gamble still try their luck a bit. I live in Las Vegas. Time of year determines how much outdoor time you spend.
There are various free things
Bellagio fountains and the conservatory inside along with the glass sculpture on the lobby ceiling and display behind the counter as all in one place at the Bellagio.
Fremont Street downtown is reachable by bus or Uber and has a huge LED light display, live band music, performers. First Friday is a special event each month.
Each casino-hotel is themed with exhibits.
There are excellent restaurants in every price range on and off the Las Vegas Strip. Use Yelp.com
Show tickets available at discount either from tix4tonight booths or online. Magic, comedy, headliners, 7 resident Cirque Du Soleil, mentalists, singers and dancers and acrobats.
Grand Canyon and Hoover Dam are both a bit of a distance.
A lot is based on what you like to do, what is scheduled, how much you wish to spend, and getting around the valley
Shooting ranges - no permit required
Something as simple as a hamburger -
The Outlaw, served at Rollin Smoke Barbeque - Hamburger mixed with brisket, onion, bell pepper, topped with onion strings, red cabbage slaw, lettuce, tomato, cheddar cheese, and chipotle aioli.
Shake Shack, Wahlburgers, Fat Boy, Habit Burger Grill, from celebrity chefs to the excellent fries at Five Guys made from fresh potatoes cut slightly thick and browned golden, there are hundreds of places to choose from.
The summer months have pool parties.
There are good golf courses.
put in the dates-
Paranormal Mind Reading Magic Show by Frederic Da Silva, Mat Franco Magic Reinvented, Penn & Teller, David Goldrake, Xavier Mortimer's Magical Dream, or even the up close magic of Armando Vera
plenty to do, but what pleases you?
There's a nice lounge at Mandalay Bay. You can order a non-alcoholic drink and just listen to the band when playing.