Welcome to the Conference Center. THCA Conference Center entrance. Patrons during the Career Expo. Entrance hall to the Conference Center. The Conference Center entrance hall is a great space for a sign-in table. A section of Conference Rooms A & B. A section of Conference Room A & B set up for a festive event. Patrons are busy during the Career Expo. Picture shows section of Conference Rooms A & B. THCA Main Lobby picture 1. THCA Main Lobby picture 2. The THCA Main Lobby is a great space to host a large event.