Here are some dangerous activities. If you do two or more then expect disaster in your life sooner or later.
Marriage, owning a gym, being in business with your wife, bodybuilding, surfing, sportscar racing, motorcycle riding, falling in love, religion, armed services.
Remember that there is a disease that most gym owners get. Not sure if the women who own gyms participate but most of the men get gym-owners disease. That is when the owner fancies a customer who is hotter than the Mrs. I have no idea what Milos has done but good luck to him. Don't forget, you can have a successful business but still have problems in other businesses or personal life and end up having to lose your gym. Gyms are high investment - low return businesses.