If you want to do the Space Needle, do some of the rest of Seattle Center while you are there (EMP/SFM, Science Center). Take the light rail into the Westlake stop, and take the monorail from westlake center to Seattle Center. Good shopping in Westlake, and across the street the Yard House is supposed to have a good selection of beer.
If you want to meet somewhere in Ballard on Friday, we can meet wherever, and I can show you around. I am currently unemployed, so I am always looking for an excuse to get out of the house.
Regarding Big Brew, there are a bunch of breweries/homebrew shops that run them, so you could ask around while you are in Ballard, and I am sure someone will know who is running one nearby.