What's the best thing to do in Miami?

I am going on vacation soon and I am from Canada and I will be staying in Miami for 3 days (before going on a cruise for 5 nights) if anyone is from or has been to Miami what is the best things or thing to do there besides south beach lol I am going with my boyfriends family any good advice on what to do there?What's the best thing to do in Miami?
PARTY! lol other from dat go 2 dolphin and sunset place dats where all of my friends hang out. although there are ALOT of teenagers... me being one... lol u R gonna hear ALOT of bad words so dont be suprised uhhh try restaurants, coral gables, cocowalk, the beach lol. its weird cause ima go visit Canada... not used 2 the cold..What's the best thing to do in Miami?
Be sure to pack your Glock 229

fazolis