Just when one is feeling little foot sore, weary and somewhat liverish from the never-ending round of festivals, concerts, and events Melbourne throws at its residents and visitors alike at this time of year, up pops a "Pop Up" with a brew that is guaranteed to put a bit of a spring in even the most fallen of arches. Melbourne's love affair with the perfect coffee has received a shot in the arm so to speak, with a "Pop Up" coffee experience right in the heart of the city. Installed as part…