Miami Beach Hotel Sets 20% May 20, 1998 Share 1 -- MIAMI BEACH, Fla. -- The National Hotel, an art deco landmark, instituted a 20% commission policy for stays booked directly and completed by June 30. The property, at 1677 Collins Ave., has a 115-room Main Tower building, which sports art deco furnishings and a 39-room Palm Garden wing with tropical decor. Palm Garden units have a private balcony overlooking the ocean or gardens. Rates through Sept. 30 are from $190 to $260 per night Sundays through Thursdays and from $240 to $310 Fridays and Saturdays. To claim the 20% commission, agents should mention code 1939 when booking. National Hotel, Phone: (800) 327-8370.