If you have room, put those that use Rise Up Singing in the root cellar (ok I'm just teasing). The best I've seen usually start off with everyone, with or without topics & then other rooms are used by those of various skills & levels, leaving the kitchen for group chorus singing & late night die hards, if it's a party, it's fun & will last & be attractive. These are only hints, if it's going to be a seminar or an education, once those that came to learn, have satisfied themselves, they will go on to seek out what no man has seen before. Good Luck Barry