Interbank has apart from their "normal" agencies also offices inside the Vivanda and Plaza Vea supermarkets numbering over 250 locations. This bank network provides ATM services under the GlobalNet brand, accepting international debit and credit cards.
Many utility bills can be paid there also. Money that was sent to you by Xoom can be picked up at this bank!
A list of all their agencies can be found on their website under "Puntos de atención".