Regular Hotel Memberships?

Would hotels consider opening their properties similar to the member clubs on island for use of pools/gyms/spa? The hotels around the island have pools and basic gyms which do not have monthly/annual family membership offerings available but could be convenient to those who do not want to go into town or may not golf/play tennis. This could encourage locals to use hospitality facilities through the use of gyms, purchasing food/beverage at pools and restaurants which would help hotel and staff providing revenue when they may not have tourists this year.