CREATE TABLE table_27648 ("Letters" TEXT, "Organization" TEXT, "Nickname" TEXT, "Founding Date" TEXT, "Founding University" TEXT, "Type" TEXT)

If the founding university is in Charlotte, NC, what is the nickname?
SELECT "Nickname" FROM table_27648 WHERE "Founding University" = 'Charlotte, NC'
SELECT "Nickname" FROM "table_27648" WHERE "Founding University" = 'Charlotte, NC'