This I think is the list of eligible Park Inns:

United States:

Park Inn by Radisson Hotel & Water Park, Albuquerque, NM
Offer Available: June 22 - September 01

Park Inn Sault Sainte Marie, MI
Offer Available: June 6 - July 12, July 22 - August 9, August 12 - September 1

Park Inn Toledo, OH
Offer available: June 24 - 28, July 1 - 5, 8 - 12 & 15 - 19, July 29 - September 1

Park Inn by Radisson, Dallas-Love Field, TX
Offer available: June 22 - July 28, August 2 - September 1

Park Inn Harrisburg West, PA
Offer available: July 27 - 28, August 5 - 11 & 17 - 18, August 26 - September 1

Park Inn Houston North Hotel & Conference Center, TX
Offer available: June 24 - July 26, August 5 - September 1

Park Inn by Radisson DFW Airport South, TX
Offer available: July 13 -14

Park Inn by Radisson, Sharon, PA
Offer available: June 22 - July 5, July 8 - August 4, August 10 - September 1

Park Inn Tulsa Airport, OK
Offer available: June 24 - 30, July 6 - 19 & 22 - 26, July 29 - September 1

Park Inn by Radisson Fresno, CA
Offer available: June 26 - September 1


Mexico:

Park Inn Saltillo, Mexico
Offer available: June 22 - September 1