DUNKIN’ DONUTS’ BIG TEXAS PUSH Franchise group 521 Interests plans to open 16 Dunkin’ Donuts stores in Houston — as part of plans by the nation’s largest bagel retailer to double the number of U.S. locations over the next 20 years. No rush, though: The first new Houston store won’t open until next year; the 15 others should all be open by 2018. Five Dunkin Donuts locations are already open in the Houston area. Also coming to Texas: 9 new franchises in San Antonio, as well as 50 in the Dallas-Fort Worth area over the next 5 years under a limited partnership agreement with the family of Dallas Cowboys owner Jerry Jones and Troy Aikman. [Dunkin’ Donuts] Photo of Bellaire location: Jimmy W.