On June 2, from 8:00 pm until midnight, all Sonic Drive-in stores gave out free root beer floats. I don't like root beer very much, but for free, I'd gladly try a float.
I went to the Sonic in Longwood, FL at 9:30pm and there were probably a few hundred people waiting for the free food. The parking was overflowing out into the neighboring bank and Walgreens, so I decided it wasn't worth the wait. About 11:30, I returned to Sonic and most of the crowds had disappeared. I got my float which consisted of soft serve vanilla ice cream and root beer in a styrofoam cup filled 3/4 of the way from the top. It was okay, but I really don't like the aftertaste that root beer leaves.
Unrelated to free root beer, I recently took a trip to Oklahoma and visited the History Center in Oklahoma City. While I was there, I learned some interesting trivia about Sonic. The chain started in Oklahoma and it seems every small town in the state has a Sonic rather than a Mcdonalds or Burger King. One one of their original menus, Sonic once sold a sandwich called The Whopper. It was a fish sandwich rather than a burger, but everyone knows who owns the copyright to that sandwich name now. Sonic official stopped the employees from riding roller skates in the 1990s, but yet the Sonic employees at the Longwood location are always on skates. From what I overheard another museum visitor, roller skates no longer happen in Oklahoma.