No problem. Their address is:
Griot's Garage, Inc.
3500-A 20th Street E.
Tacoma, WA 98424
They are actually in Fife. From the High School driving South on 20th Street. Go past the BMW dealership and the Costco Business warehouse. They are located in the second to last row of business buildings/warehouses on 20th Street. Their building is in the triangle made by 20th and Industry Dr. E and is the end office (closest to Tacoma).
Hopefully this link to Mapquest will work.
Griot's Garage
Soon they will be moving to a new facility in Dupont. So that will be a little further away.
Griot's will also demonstrate any of the products at the R&D center down the street. Unfortunately they will only do a small area to show you how to do it. You have to finish the job when you get home, but it's pretty cool anyway. Just ask them about it. They also have tech sessions year-round for the local car clubs. I go there at least twice a year with the BMW club. So if you belong to a club, ask about getting a tech session going. They're free and you will learn SO much from them.