The jazz band Night & Day drew a packed crowd to the café of the Portland Museum of Art, during the museum’s weekly “Jazz Breakfast,” held on Sundays at midday. The art museum – with its world-class collection of 19th and 20th century works by the likes of Louise Nevelson, Mary Cassatt, Pablo Picasso, Pierre-Auguste Renoir, Winslow Homer and Andrew Wyeth – and the neighboring Portland Children’s Museum and area …