We’ve spoken highly (sparking some debate) of Pagliacci as our place for pizza by the slice—at least locally. But imagine our surprise while reading a recent USA Today and seeing the Queen Anne location listed as one of the country’s “10 great places for solo diners to pull up a chair.” (The article was put together in celebration of National Singles Week, which started Sunday.) Bar Boulud in New York City with its charcuterie bar......