Click through to read a detailed guide
http://eshaqs.blogspot.com/2012/02/5-star-hotels-for-cheap-ihg-friends-and.html

A step by step guide on how to get 5 star hotels for cheap using IHG friends and family rate. This includes hotels from the Intercontinental Hotel Group also known as IHG which is made up of the following brands: InterContinental Hotels & Resorts, Crowne Plaza Hotels & Resorts, Hotel Indigo, Holiday Inn, Hotels & Resorts, Holiday Inn Express, Staybridge Suites, and Candlewood Suites.

source