Homegrown restaurant chain Sahm's plans to open a new tavern and restaurant in downtown's Gibson Building. Sahm's Tavern will take about 3,600 square feet on the first-floor southeast corner of the 1916 building, which has OneAmerica and ExactTarget as its anchor office tenants. Meanwhile, Cincinnati-based First Financial Bank is taking the first-floor southwest corner. A large space fronting Michigan Street still is available. OneAmerica spent more than $10 million renovating the former car manufacturing facility southeast of Capital Avenue and Michigan Street. The Sahm's plans call for a 60-seat tavern and 50-seat cafe with outdoor seating on both sides, said Ed Sahm, CEO of Sahm's Companies. It is scheduled to open in August. Building out the space will cost about $500,000. Sahm's earlier this year opened a new restaurant and catering facility about a block away, in the 38-story OneAmerica Tower. Sahm's at The Tower has more than 300 seats and replaced an old location on the second floor of M&I Plaza. An earlier post on the Gibson Building is here.