The lines on the street are up to two hours long, yet loyal fans wait patiently to snatch one of the two dozen barstools at the Swan Oyster Depot. Once seated, you’ll get all the attention you’ll ever need. Men in the white aprons typical of fish barkers remind you of barkeepers that mix their ever-changing dishes like drinks. The clientele comes back again and again. Why? The family-owned and operated business has been serving the freshest fish in the city for over 100 years.