Here is what I found....
1) Las Vegas Kosher Deli 3317 Las Vegas Blvd S
LV NV 89109 (702)892-9080
This is located in the Fashion Show Mall- Across the street from Wynn Las Vegas
2) Casba Kosher Restaurant & Deli
855 E Twain Ave, Las Vegas, NV (702) 791-3344
These two have the same address, this is the way it was listed. Not far from the strip area. Only about a 1.5 mi from Wynn Las Vegas hotel and casino
3) Haifa Restaurant
855 E Twain Ave, Las Vegas, NV - (702) 791-1956
www.haifarestaurant.com
4) Adar Kosher Pizza Restaurant
318 W Sahara Ave, Las Vegas, NV - (702) 385-0006
will be on the east side of the strip not far from Sahara Hotel and Casino.
5) Shalom Hunan
4850 W Flamingo Rd # 34-35, Las Vegas, NV - (702) 871-3262
On the west side of the strip, aprox 2 miles on Flamingo.
6) Sababa
3220 S Durango Dr # 1, Las Vegas, NV - (702) 547-5556
This is on the west side of town as well, and yet the furthest, aprox 6.5 miles.
Hope this helps your friend and they enjoy their trip to Las Vegas.