Gainesville the Band at O'side Sunset Market

They describe themselves as playing a mix of classic R&B, Rock, Country and Pop music so it seems like a pretty good variety. I listened to their little clip and they sounded good.
They start at 5:00 and play till 9:00 but I posted from 6:15 for 2 hours. Come whenever you can and stay as long as you want. There's lots of food booths with large variety and souvenirs and things also. If it's clear I might head down to catch the green flash about 8:00