I to have found these rates to be cheaper at peak season and you also get some nice extras.
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A room upgrade when available, upon check-in.
Daily continental breakfast for you and a guest.
Guaranteed four o'clock p.m. late check-out.
Complimentary formal afternoon tea service for two, once during your stay.
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http://travel.americanexpress.com/tr...1&ci=246&p=701