Hachi is a great sushi spot in the Summerlin area, located in the Red Rock Casino. I stop in here every couple of weeks and will meet friends for a bite.
Their 38 under $8 portion of the menu is great! Some of my favorites dishes are:
-cucumber salad (huge portion)
-salmon/avocado roll
-salmon sashimi
-shrimp and rice noodles (not on the 38 under $8 menu)
Staff is always very friendly and the atmosphere is casual but chic.