Twenty years ago, when Donna Lennard opened Il Buco (47 Bond Street, 212-533-1932) on Bond Street, she wasn't planning to become a restaurateur. Il Buco wasn't even a restaurant then. Lennard was an independent filmmaker caught up in a romance with an Italian named Alberto Avalle, who wanted to export pieces of Americana to Europe. The pair had been collecting antiques from around the region when Lennard learned the artists at 47 Bond were planning to leave the address, which they were using as a studio, because rent was rising from $1,700 a month to $2,000. The couple signed their first 10-year lease, refitted the space, and began selling old radios, quilts, and furniture.