Ключевые слова: app, bill, cafe, cafeteria, card, caucasian, cellphone, coffee, consumerism diverse, contactless, couple, credit, credit card, customer, day, dinner, food, happy, holding, laughing, male, man, men, mobile, pay, paying, payment, person, pin, pizza, reader, restaurant, service, smartphone, technology, technology wireless, terminal, transaction, waiter, woman,