Advertising for a gym
Q: My partner and I are planning on launching a mobile app for health conscious people. In the app, people will be able to review and rate healthy restaurants, gyms, sports gear, supplements, etc. Our revenue will mainly be through advertising for healthy restaurants, gyms and sports brands, etc. Some of the gyms here use music during workouts and some of them have male and female customers, even if both genders are not training in the same area or at the same time. We are not opening a gym, but we are providing a platform where people can review gyms in terms of quality, trainers, equipment, etc. and our revenue would partly come from gyms through them advertising on our app. Is this permissible?