Here's where to down bloodies, dim sum, and more this Monday, September 4th: A&J Restaurant 1319 Rockville Pike, Rockville; 4316 Markham St., Annandale These spare Northern Chinese dim sum houses are open daily. Go for potstickers, zesty noodles with ground pork and bean paste, and sesame biscuits. Ala 1320 19th St., NW Doctor up your