OnDeck Capital Inc. expanded its headquarters space at 1400 Broadway in New York City by 79,000 square feet. The small business lender will grow from 38,000 square feet to a total occupancy of 117,000 square feet in the Empire State Realty Trust-owned building. The 38-story, 908,237-square-foot, 4-Star office tower was built in 1930 in the Penn Plaza / Garment District submarket of Manhattan, at the northeast corner of W. 38th Street. Keith…