Actually One of My First Guilds I operated was in Dale's Dungeon (D&D Gaming Center) On the strip across from Great lakes naval training Center in N.Chicago back in the mid 70's

By the way there Was "Internet" back in the 70's and internet gaming. Although it wasn't as widely available and popular as it is today, Compuserve was available to us although expensive, but yes us ancients could get online too.