Find your oasis this summer at Valley Beach Poolside Club at Valley Forge Casino Resort (1160 First Avenue, King of Prussia, Montgomery County). Valley Beach Poolside Club will officially open for the season starting Memorial Day Weekend Friday, May 26 through Monday, May 29, 2017. King of Prussia's 20,000 square foot poolside club brings back the surf and sand with open-air bars, poolside dining, private cabanas, a sandy beach, live entertainment and new surprises for the 2017 season. Valley Beach Poolside Club offers all of the fun and relaxation of the beach without the hassle of getting there. Skip the Jersey traffic and stay local this summer.