Capone's Coney Connection
Further research shows that the restaurant in question was the Harvard Inn, and that it was at the Harvard Inn that Capone received the facial the scars which earned him the lifelong nickname 'Scarface.'
According to the website, My Al Capone Museum, "The Harvard inn was a two story building situated on Seaside Walk, between the Bowery and the Beach at Coney Island. The Harvard Inn was destroyed by fire at 2:30 Am on January 24,1925."
Brooklyn Today: Thursday, January 17, 2008 [Brooklyn Daily Eagle]
Frankie Yale [My Al Capone Museum]