Giving my 2 cents cuz I'm bored
Personally, if you're talking fast self defense, you want a quick defense and a limited number of offensive strikes. If you're talking quick, that means you're not talking getting anything really good, just as few techniques as possible so you can still remember proper mechanics.
My personal choice would be Western Boxing. If you've only got a week to train, you could at least learn how to punch correctly. No boxing school will let you spar without at least 6 months of training (acording USA Boxing- the amateur boxing federation). Western Boxing is actually a deep and rich tradition, after getting a good taste of it this summer, it's much more of an art form than I would've ever guessed.
Koing
What you described about a punch leaping forward with no pull back is consistent with boxing. I don't know what Rocky movies you've seen, but any pulling back movement, except instantly after the punch is thrown, is generally a bad thing.
omegapoint-
I agree with just about everything you said about okinawa and japan. I went to high school there. Eventhough I trained kung fu while I was there, I had a lot of friends who did Shorinryu, Uechi Ryu (or whatever the real name is), Seidokan, and a friend who fought kyokushinkai (although he learned on the mainland). I'm not a huge fan of Shorin Ryu, I'd met Fusei Kiisei a bunch of times. The uechi Ryu fighters were famous for sending 15 year olds to on-base competitions, and breaking Marines' legs in sparring. I remember hearing a saying from the older generation that was popular when the last emperor died: "Emperor die, me no cry". I'd just like to make 1 miniscule correction. Okinawan dialect is Uchinaguchi. Hougen is a Japanese word that's like an umbrella term for any japanese dialect.
In college, nothing to do and no money so no beer.