I know many people you'd never expect who are learning Spanish, and not in some stuffy University setting either.
They learn words like,

"una media," "diecisiete," "un gramo," "negra," "blanca," "apestoso," "mota," "un pedazo," "quince minutos," "muy bueno jale,"
"bien arriba," "cien dolares," "cincuenta dolares," "no mas pinche corte," and "cuidate, hay muchas placas
aqui."