Firehouse teamed with Asher Media to pick up Wingstop Restaurants’ media business last week, the client said. The Fort Worth co-op said it may also use Firehouse, Dallas, for creative duties in the future. Participating in a review for the media were FFwd and Calise & Sedei, both in Dallas, and SSA Graphics in San Antonio, the client said. The co-op previously handled its media in-house. Spending was estimated at less than $1 million.