If you can’t wait until June or July for Dunkin’ Donuts to open inside the Loop at the former Arby’s at South Shepherd and Fairview, you might plan to come here, the former SmashBurger at 10705 Westheimer, where a company rep says that the donut makers will open in May the first of 16 planned Houston stores. Sharing the Westchase strip center with a Cricket store and Brookstreet Bar-B-Que, the coffee-colored endcap has undergone at least one other renovation: A drive-thru lane now cuts through what had been SmashBurger’s treeside patio.