Tenant Lounge. Special Area Created for Residents of San Antonio's Frost Tower. f 36 I designsolutions fall 2020 rost Tower is now an iconic addition to the downtown skyline of San Antonio, Texas. Designed by world renowned Pelli Clarke Pelli Architects, the tower offers 23 floors of Class A++ office and retail space surrounded by beautiful parks and a walkable, urban environment. The primary tenant is Frost Bank.