A restaurant row reference to a particular area typically means that the location has a sufficient "critical mass" of restaurants sometimes of varying cuisine and guest service type, where diners can first decide to dine at the restaurant row in gneral before choosing a particular restaurant.
In some instances, enough restaurants are grouped at one location so as to provide such a location with sufficient critical mass to secure a status as the "restaurant row" of a particular region, a compelling place to go for a mid-day or evening's meal. This decision by a diner made easier due to the perceived choice of restaurant available at the restaurant row location.
