Just received this in my inbox:
Buy any Burrito or Bowl & get a second for 1$.
The fineprint: Valid 07/08/2013 only. Second item must be of equal or lesser value.
Not valid with any other offer.
Unfortunatley it does not state if you have to bring the voucher or if the offer is valid for club members only,
but i would assume that just mentioning the offer will be fine.
They should ask for your member card when you mention it. Manager reminded everyone to ask for the card.