St. Louis’ newest concert venue opens tonight in the Delmar Loop neighborhood. With Delmar Hall, Joe Edwards and Pat Hagin, co-owners of the Pageant concert hall next door, continue their push to make the neighborhood an entertainment hub. “This is the live music corridor, center, of St. Louis and this just cements that,” Edwards said. Delmar Hall will seat up to 800 people and focus on concerts, comedy and private business events. Edwards said up to 25 percent of the acts will be local performers with national touring groups making up the remaining shows. The opening weekend features Stir, Jay Farrar , and Hippie Sabotage .