For the 2008-09 season, groups of four or more can ski for less at Alpe d'Huez. Buy tickets together for the same duration and receive a 10 percent discount on ticket costs. More information at www.alpedhuez.com
Further discounts are available when visiting on Saturdays. This is a web deal, so be sure to visit the below link by Wednesday to see what discount is offered next Saturday and get a voucher to print out and present at the ticket office when you arrive.
To access the deal directly visit Satski.