Your cafe should be making a healthy profit on its coffee sales. A 20g basket is plenty to make two espresso's with quality coffee. There is no need for +30g - this will eat into a cafe's profits and only benefits the roaster. Do your numbers - you might be surprised.
The best thing about having family in Ireland is that when we go to visit them we get to travel around Europe a bit .. spoilt I know! So this time we checked out the Coffee in Northern Ireland, Rome and Barcelona.
A step-by-step guide to making espresso based coffee for the beginner with a focus on use within a commercial environment, however, a similar process can be followed for a manual espresso set-up at home too.