I have experienced coffee that has sometimes not been made to the standards that a good coffee outlet should.
Did you kindly tell them of your problem after you tasted it?
A lot of times people let their feet do the talking, and cant be bothered raising the issue, especially in Australia, and then they tell their friends and blog it on the internet after they get home.
On the other hand, being in the fine dining service industry, it is my job to ensure my clients are happy with their meals by following through after they have received their dish.
I would approach them a few minutes later and see how theyre enjoying it.
I wouldn,t suggest cafe owners go to each and every customer about their coffees but at least take a bit of time to glance around or have a quick chat when clearing tables.
Gary at G