We are doing Sweeney and Mrs. Lovett as well. I bought an antique straight razor at an antique/collectibles mall for $4.00. Dremeled down the blade (I did have to go down quite a bit) for safety.
We'll be serving meat pies at the Halloween party, as well as doing a murder mystery game. We've also memorized the "Try the Priest" song - whether we'll have the guts to perform it is another matter...