sundays and possibly saturdays. early sunday morning is the corvette club, which usually brings in 100+ cars or all ages. later on in the day is the harleys and the ninjas, occupying opposite sides of the parking lot. oh, and it's at the end of robert moses causeway. when travelling south, you'll cross a long bridge, then see a sign that says 'Ocean Beaches Next Right'. That takes you to Ocean Parkway, and after about 1000-2000 feet OBI will be on your left (you'll have to turn around to get there.)it's a good place to meet up with other riders, then go riding, but there isn't much there so it's not exactly a place you'd spend the day.