Venue: Blue Ribbon Brooklyn Location: 280 5th Avenue, Park Slope, Brooklyn, NY Phone: 718-840-0404 Website: http://blueribbonrestaurants.com/rests_brass_brook_main.htm Oyster happy hour: Oyster of the bar’s choosing for $1.50 each, $8 for a glass of  l’Oiseliniere Muscadet, from opening to 6:30 p.m. seven days a week. Monday through Friday, they open at 5 p.m., Saturday and Sunday you can get started at 4 p.m. Several years ago, my husband and I…