Picture New Orleans with the crowds of Mardi Gras. Now move those hordes to the area in front of the Driskill Hotel, 6th St., and all downtown areas in the center of the city of Austin for SXSW. A free concert by Garth Brooks is planned for tomorrow night (Saturday) and this night a Prince tribute concert was crowded with music-lovers.You can hardly walk through the barricaded streets because of the crowds. The smell of marijuana is in the air. It’s quite the scene in pleasant eighty degree weather.