Snail, you are so right. We run our "Sing and Play" evenings and we break even most all the time but sometimes it costs us money(subsidising, travel, hosting, advertising,etc.) but we happily regard it as paying for our indulgence of enjoying a variety of good, live music throughout the year; in exactly the same way a member of a tennis or golf club does not expect to make a profit .
                                                       John