The InterContinental Hotel Group has launched an incentive for guests at any of its 4,100 properties whereby they will receive one night's free stay for every two spent at any Holiday Inn, Holiday Inn Express, InterContinental, Crowne Plaza, Hotel Indigo, Staybridge Suites or Candlewood Suites between May 4 and July 3.The stay can be redeemed at any hotel in any country up to a maximum of four free nights.