First of all, Chamar Medina is of questionable usage when wine is availible, which it nearly always is today.
Rav Moshe Feinstein zatzal defines Chamar Medina as a drink special enough that one would drink it even if not thirsty. Water cannot be Chamar Medina.
Therefore, brewed coffee would be CM but instant would likely be considered flavored water. Pure OJ is likely CM, but from concentrate is questionable. Soda is certainly not CM.
A drink that is not flavored water would certainly depend on the time and place, and the application of this Halacha could easily be different in EY and the USA.