Make plans now to attend the biggest, coolest, hottest party of the summer – the 21st Annual Margarita & Salsa Festival happening on Saturday, August 27, 2016, at the Extraco Events Center in Waco. All proceeds benefit the Scholarship Program at the Heart O’ Texas Fair & Rodeo. This is one of the larger music events on the Waco calendar with an average of 10,000 attendees and a summer send-off for thousands before college classes begin. So if you dig margaritas and great country music (who doesn't, right?), then mark your calendar.