Went to a locally owned Italian restaurant over the weekend. It's a reasonably nice place, not a "chicken parm 'n pizza" kind of joint. The place was packed, although we've been there at times when it was only half full (open less than a year, so maybe just slowly catching on). Anyhow, as we were seated and our waiter did the usual intro, he said "I'll give 10% off if you pay in cash". Found it kind of strange. Would you think that the restaurant is doing something "shady" with the cash (ie, keeping it off the books) or what?