Needless to say, going cashless has its advantages too. One restaurateur told the WSJ that he believes his managers save about 23 hours’ worth of work per week not having to count cash, order change or deal with going to a bank. But businesses also risk alienating customers who prefer to use cash or, in some cases, can't get cards. In fact, a study published last year found that about 64 percent of Americans aged 16 to 36 don’t even own a credit card . Sure, many of them probably have debit cards, but the number of debit card holders in the US in 2014 was projected to be about 197 million ; that’s a lot, but still significantly below America’s adult population that year of over 240 million. Is it worth potentially alienating 1 in 5 customers that walk through the door?