Email list, so they know whats up. Maybe your secritary could be in charge, or some one. But it should be that person's job to handle all correspondance, instead of everyone always emailing just whenever. But don't limit jokes, etc from other sisters. If this is something you are worried about you're probably not the only one. Bring it up at chapter, or talk to a few girls you're close with. Then if you're a smaller chapter, get the whole group together. If you're chapter is huge then start calling/iming/emailing sisters randomly to come hang out. NOt always the same people. If you can get all this organized you should run for an office, if you're not already one.
Good luck.