"Kalle" or "Calle" is a term meaning "street feel" or "street smarts" or, in context, what we used to call "hip".In Orlando....
WRUM-HD2 is relaying Mega 97.1 "Musica con calle" (music with street?) LPFM
Like all vernacular, terms like that have a short street life.
"Juan es bien calle" means Johnny is very much a street guy, he's got cred, he is hip or cool.
If I said "Q-102 es horriblemente calle" I might mean that Q-102 is terribly vulgar and common sounding. It all depends on context.