If there are no only male gyms in the whole country and I would like to gain weight. Is it permissible to go on times when there are less people and choose a gym that not a lot of women go to (there are some "ugly" gyms that don't have a lot of women) So there wouldn't be that much fitnah if any?

Ustadh AbdulAziz al-Haqqan

Buy some equipment at home akhi and train.