Primo coffee. 388 george st, sydney. Much more cheery in atmosphere than you’d think possible from a café with no access to the sun. Friendly, helpful staff who remember regular customers by name and by order. It even has a wi-fi hotspot.
Coffee takes a while, and if you drink it quickly enough you can avoid the aftertaste that I can only compare to instant coffee. Best consumed quickly; perhaps their caffeinated coffee is better.