Most hotels in Las Vegas have coupons available at check in when you book under certain rates. In some cases, if you earn points through their casinos you will receive free buffet meals or dollars off. It is a good idea to contain several hotels before traveling to find out what promotional offers they currently have to see which is the overall best deal.
Mahalo's Las Vegas Buffet Coupons page has links to some of the hotels and possible coupon deals.
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