If you mean Monday the 29th I suggest something based on the super bowl or survivor2. Actually a play on any reality show could work. Call it XYZ Island. Or whatever.
Anything based on a chapter favorite tv show can go over really well. As well as popular movies. Years ago our chapter did Clueless and it came off so well.
Random cheesy idea--Greek Gods on Mt Olympus looking down on your chapter talking about how completely fabulous ya'll are.
Or you could do a game show. Where contestants answer questions about the chapter, sisters, etc.
Hope these are a spring board for other ideas! Good Luck