Complex sentence: Broomfield was an ex-Pullman porter who owned and ran the Midway, a nationally-known saloon and gambling hall, at 1124 Capitol Avenue near the notorious Sporting District.
Split into simpler sentences: Broomfield was an ex-Pullman porter who owned and ran the Midway, a nationally known saloon and gambling hall. The hangout for men was at 1124 Capitol Avenue near the notorious Sporting District.