Yes, ours is called Soda Stream so it must have started in Australia and just hit American last year. Of course it's possible it was available in other parts of the country before we got it in Texas, but the television commercials just started advertising it last year. You don't see the commercials for it anymore, so perhaps it didn't achieve the popularity hoped for.
Dr. Pepper tastes nothing like licorice so it couldn't be similar to sarsaparilla. That's an old fashioned drink that you only hear about in old westerns. (cowboy movies) Root beer is quite popular and has been since the 50's.
I don't know what ginger beer tastes like (probably not like our semi-sweet soft drink Ginger Ale) but root beer is not served in bars. (pubs) It's a soft drink like Coke, Pepsi, 7 Up, etc. purchased in grocery stores. Club Soda is not a soft drink. It's an unsweet sparkling mineral water used in bars to mix with alcohol. People rarely drink it as is.
I drink gin & tonic - best with very good gin like Bombay Sapphire & a good brand of Tonic Water (carbonated quinine flavor used as a mixer in bars.)