We take Cinco de Mayo seriously in Myrtle Beach. Partly because margaritas and coronas taste better in the South Carolina sunshine and partly because we just love a good fiesta. While one of the more popular annual events, “Burro Fest,” won’t take place this year (the Mexican restaurant that hosts the event is closed for renovations), Broadway at the Beach has announced they’ll be having a party big enough for everyone. The day’s festivities are set to begin with a 5k race at 8:30 a.m. at Senor Frog’s at Broadway at the Beach. Race packet pick…