Lago Mar Country Club Summer-Plus Membership $* Per Month (Monday*-Sunday) (May 1st-October 31st) No Initiation Fee* Join prior to April 15th and get the month of April . Lago Mar's facilities are reserved for the exclusive use of registered resort guests and See more. Great Rates · Deals up to 33% Off · Real Guest Reviews · Check RatesAmenities: Mobile Friendly, Secure Checkout, Read Reviews, Updated Pictur.