On the size of the resulting to the UK bar segment criteria hand, the UK bar owner ought need to ask this question: Are the segments of an economic size to whose bar business? Any basic for bar segmentation should yield segments that are of a size that the bar can profitably exploit, because as the bar segmentsget smaller who get closer to achieving the marketing philosophy of satisfying each bar client's needs as though each one were the center of the bar's attention. The problem for the uneconomic to provide for what a reasonable size of bar segment is varies from one UK bar market to another and is constantly changing over time. In the bar market, it is possible to provide quite unique tastes of wines or foods to target very small segments of the UK bar market. For example, if the bar target client group is professional female office worker clients. I think it ought need to locate its bar in the office areas location and the office and the office can not be close to supermarkets because supermarkets will have different style of wines and coffees to sell and its provision of cup of wines and coffees drinking and foods tastes must be different to supermarkets wines and coffees and foods tastes and the bar needs to consider what the entertainment is the professional female worker clients who need to enjoy in the quiet or noise bar environment. Because this factors will influence the bar's female professional workers' psychological needs and satisfactory needs. If who feel the bar's drinking and food and entertainment service provision which can't satisfy whose demand, who can choose another bars to close to office areas to cause the bar female client numbers will reduce. On the UK bar measurability criteria hand, the UK bar owner needs to ask this question: Can the bar market segment be measured? Ideally UK bar should be able to know the precise size of its identified bar market segment(s). This is imported in order that the bar segment(s) can be compared and its profit potentials assessed. Unfortunately, UK bars clients data are often not available to the UK bar quantity market segments. So the UK bar owner should believe the areas of bar clients exist but can't measure or the bar client numbers should define bar segments only on the basic of what it can accurately be measured, but the different areas ( location) bar clients may have litter bearing on the homogeneity of bar consumers' needs and consumption aims or reasons. The UK bar market segments information have include, e.g. the age profile of an area, number of people per household etc. However, bar owner also needs to assess of individuals psychological subjectively factor, such as whose attitude and lifestyles, e.g. if the professional female worker who does not like to drink coffee or wine drinking, even the bar location is close to the professional female worker office client, it will not persuade who to enter the bar.