Hi - I live in Vegas (yes, there really are people who live here and DON'T gamble). If you want a VERY nice First Rate hotel with a very "beachy"-atomosphere I would recommend Mandalay Bay. Your on the strip, it's a GORGEOUS hotel, has a sandy Beach pool, very south pacific flavor with wonderful restaurants and service. Close to everything and great shows. I always recommend Mandalay Bay and or "THE HOTEL" at Mandalay Bay (even more upscale). Hope you enjoy your stay and be sure to dress for our "dry heat" (104 today and pouring rain). Take care!
It's also very safe for a single woman (I am too). Be sure to see one of the Cirque de solei shows throughout the city different venues have different shows.