I live near Gulfstream Park and really enjoy going here. Parking is free, total bonus. They always have plenty of parking which is really nice and super convenient. There are tons of great places to grab a drink, one of my favorite's being Yard House. Tons of different beers on tap, really nice place. Also love the Martini Bar. Really great Martinis, $5 happy hour is nice.
There's also tons of shopping here as well. Most of the shops are very high end ($5k for a stroller!) but there's some good ones like the Container Store and Pottery Barn.
And, of course there is the race track. Really fun watching horse racing, bet a couple bucks and made a couple bucks. Good fun for sure.
Horse racing is seasonal, I'd check the site for times.