Dear Basil Thai, here is a business tip: this group of 9 people that I just brought in is not the only large group I will ever take out to lunch. By making me wait for my itemized receipt while you (repeatedly) checked out single diners, you are telling me that you value their business more than mine. I will not trouble you with my business in the future, as you appear to be unprepared and unwelcoming to university (business) diners.