The number of people in the store varies. There will be stretches when only one or two customers come in every few minutes. But at a moment when business couldn't get any slower, a rush of customers will come in. Sometimes this is predictable: weekdays at 10:30am a flux of ESL students come in from the English school; Friday and Saturday evenings patrons waiting for a table at the Vietnamese restaurant across the way come in to get a drink. Other times, a long line forms for no discernible reason.