Not sure where you are located, but right out side of Montco, the Columbia Bar and Grille in Phoenixville has $l.00 Oysters all night on Thursdays.

My guess is you'll be visiting during the weekend. Also in Phoenixville is the Columbia Bar and Grill, they have both Saturday and Sunday Brunch, also dinner both days, and a menu that would be good for the group. www.columbiabarandgrille.com