Recently, a group of us gathered to have drinks at the Loews hotel bar. Very nice space.
When I got the tab, the bill only included a total, no detail. When I asked the waitress for adetailed bill, she was hesitant, said she would get the detail, but never returned. I suspected that due to the large group, she had added gratuity, which is completely understandable. I confirmed with the bartender that gratuity was included, which is probably why she didn't want to show me the detailed bill.
Pretty sneeky and bad business.