Speaking as somebody who's never even smoked a cigarette or a joint: are there people who tried to recreate the "original" coke recipe? The one with "unprocessed" coca leaves? Is it available on say the latest instance of Silk Road? What is it like?
The book on the history of coke says that when cocaine was removed old timers would stir some in. However it has no real effect, as ingesting cocaine is not particularly effective except in the presence of alcohol. (The original French recipe that Coke was borrowed form had red wine in).
Very interesting, considering the existence of this: http://en.wikipedia.org/wiki/Kalimotxo which sounds a little weird but actually tastes pretty good.
I bet it would be pretty mild - like a cup of ephedrine tea (banned for a while now, how stupid). Cocaine, even in its pure form, is not that much of a stimulant and it has a short half-life - methamphetamine or even amphetamine would be much better choices. Or just grab some phenylethylamine while it's still legal.