Don't know about Charlotte, there are a few great ones around Greenville, SC where I live. Took my 2 day old 2012 Focus to one and have no complaints. If you're ever down this way, I can recommend a few...
EX-Zetec Crew #44 -- 2003 Focus ZX3
Sonic Crew #24 -- 2012 Focus HB SE - Traded
Sonic Crew #24 -- 2014 Focus ST - Traded
Still Sonic Crew and Long Time Member -- 2015 Honda Accord Sport 6spd Manual