One pot of beer(285 ml< 10oz> here in Oz) contains over 100 calories and the nutritional value is practically nil.Over six of such would be roughly the equivilent to a whole meal.
Of course is someone is eating too many good food calories they may put on fat too, depending on metabolism and other issues, so it is best to look at your over all diet as well.
Another factor is that alcohol will decrease inhibitions and you may eat even more.