San Francisco's Municipal Railway has a peculiar problem -- its
F- Embarcadero streetcar line, which runs from the Castro to
Fisherman's Wharf, is too successful for its own good.  The
line, which uses vintage streetcars from around the United
States, and a few from Italy, is packed with passengers all day
and half the night. On Saturdays and Sundays it's even worse.
"Some passengers tell me that as many as five cars passed them
up before they could get on," Charley Robinson, a regular
streetcar driver, said the other afternoon.  His car had
standing room only when he left Fisherman's Wharf and swung onto
the Embarcadero. By the time he got to the Ferry Building, the
customers were packed in like the proverbial sardines.  It was
hot and stuffy inside. Kids were crying and riders -- most of
them tourists -- were wondering where they were. Robinson, a
cheerful man, was peppered with questions. "How do you get to
Chinatown? Which way is the train station? Do you go to Golden
Gate Park?"  "We are basically overw