Dewey Ballantine LLP subleased 37,165 square feet in the Frost Bank Plaza building at 816 Congress Ave. in downtown Austin. The law firm joins Cammack & Strong and the Travis County Bar Association as members of the legal community occupying the 433,024-square-foot structure. Akin Gump Strauss Hauer & Feld LLP, which vacated the space during early second quarter 2002, previously occupied the space on the 19th and 20th floors.