Utilize the input text as a context reference, choose the right relationship between metro and restaurant from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Tourists and business travellers visiting Germany are often surprised when they reach to pay for their beer, metro tickets or even a large restaurant bill that their credit cards are not welcome.

Answer: industry