Mike is correct, if you think that you can stand in a room of friends,family and individuals and talk cleaning and get work then I think you may be disappointed as it's not a passion buy industry as such although you could collect names for quotes but imo an expensive way of doing things, selecting your guests carefully could work like interior decorators, building managers etc although if you are just starting out these are people that you may want to use later when you have honed your skills more as these can have tricky items to clean.