Milwaukee-based marketing and advertising firm Zizzo Group Inc. is buying a building in Walker’s Point, where it will move its headquarters from the neighboring Historic Third Ward neighborhood. The firm plans to add up to 20 jobs within two years of moving into its new digs, which it will open early next year. Zizzo Group is buying the former Brass Light Gallery at 131 S. First St. The purchase price is $1.25 million, according to “We are doubling down on two of Milwaukee’s hottest neighborhoods,” Anne Zizzo, founder and chief executive of Zizzo Group, said. Zizzo noted in a recent interview that her firm will hold onto its current office space at 207 N. Milwaukee St. Zizzo Group is devising a plan to bring more amenities to its Third Ward location.