AHonolulu: Best shopping in Honolulu?
The International Market Place is a great stop for shopping. And there is some great shopping if you walk around Waikiki.
ALas Vegas: Nicer restaurants in Vegas to celebrate a 21st birthday?
Vic & Anthony's Steakhouse in The Golden Nugget. Guaranteed to have the best meal of your life. The steak and creme brûlée are a must.