Omni Select Guest members who participate in Amtrak Guest Rewards can earn a free night plus 500 points per stay after completing three stays before April 30, 2010 at select hotels on the East Coast. Participating hotels are all located within walking distance or a short drive from an Amtrak train station and include The Omni Parker House in Boston, Mass.; Hotel Omni Mont Royal in Montreal, Canada; Omni New Haven Hotel in New Haven, Conn.; Omni Berkshire Place in New York City, Omni Hotel at Independence Park in Philadelphia or Omni Shoreham Hotel in Washington, D.C. Registration for the promotion is required at http://www.insideflyer.com/link/?2203 — Membership in both Omni Select Guest and Amtrak Guest Rewards is required and you must select Amtrak as your earning preference in your Select Guest profile. After completing three stays at the hotels listed above, you will receive a free weekend night that can be used at any of the participating hotels before Dec. 31, 2010.