Central Square's popular All Asia restaurant and nightclub shuts down on July 21, and a farewell "liquidation party" happens this weekend. If you're looking for stylish nightclub mementos, head on down and haggle. Says their Facebook page: "We are selling everything because the club is going to be torn down. Everything must go!!" They're taking extreme measures because, as Boston Restaurant Talk and Cambridge Day report, the space will be upgraded to a completely new restaurant and club called the Prospect Lounge, which promises high-quality, "global bistro" fare. All Asia and the Prospect Lounge are run by the team behind Pu Pu Hot Pot (soon to be the Dumpling Room), just down the street. The bartering party starts on July 20 at 5 p.m.