If you go to the same places at the same times, you will usually meet the same kind of people. The answer is not a dramatic makeover. It is deliberate variety.
Work from a hotel lobby once a week, choose a gym near a business district, attend one professional or charity event each month and say yes to invitations that expand your circle.
Become a regular
Familiarity lowers the social barrier. Staff remember you, introductions happen naturally and you no longer enter the room feeling like an outsider.