Alisha Damodaran, a Starbucks representative, said the pay-ahead option was made available Wednesday on the Starbucks mobile app in the Portland area, with customers able to select from 150 stores where they could pick up their orders. The company will also announce the Friday opening of its Starbucks Reserve Roastery and Tasting Room in Seattle, an upscale store where visitors can try its special batches of coffee.