A payment company separate from a retailer runs a payment application having credentials on a server computer. There are wireless personal portable interfaces belonging to the payment company but located in real and virtual retail, showrooms. The retailer agrees to the credentials of the payment company, which include prespecified real and virtual currencies for remittance. Credentials also include rules regarding limitations on acceptance of remittance in virtual currencies. A customer having a personal portable device enters a showroom and selects merchandise to purchase. She selects a payment company who remits payment to the retailer according to the credentials.