Miami beach is definitely gay friendly but gay guys are really more concentrated around 12th street. Always a good mix of local people and visitors, friendly atmosphere, a lot of soft cruising (don't misunderstand the category, no action happening here .... from what I know :) ) with eye contacts, smiles and chats while tanning on the beach. You'll find plenty of concessions, from loungers and umbrellas to shades and beds as in the rest of Miami beach.