Advertising services, namely, promoting and marketing the goods and services of others in the field of cultural events, restaurants, shopping, travel, entertainment via print and electronic media; Entertainment admission venue control services, namely, the remote verification of ticket validity upon presentation of tickets at an entertainment venue; Management of event ticketing for others; On-line price monitoring and adjusting for customers of travel related purchases; Price comparison rating of accommodations; Price comparison services; Procurement, namely, purchasing tickets to entertainment events for others; Promoting the goods and services of others by arranging for businesses to affiliate their goods and services with the goods and services of third parties by means of sponsorship relationships; Promoting the goods and services of others by providing a website featuring coupons, rebates, price-comparison information, product reviews, links to the retail websites of others, and discount information; Promoting the goods and services of others by providing a website featuring discount vouchers, rebates, price-comparison information, product reviews, discount information, travel reviews, lodging reviews, transportation reviews, service reviews, service information; Providing consumer information services and making referrals in the field of entertainment services for products, services, events, activities, facilities and locations; Providing hotel rate comparison information; Providing on-line directory information services also featuring hyperlinks to other web sites; Providing on-line referrals in the field of travel, lodging, and related accommodations; Providing price comparison services in the field of travel, hotel rates, and other accommodations via the Internet; Providing travel management services