Yup.
Q and Kremwerk are probably your big clubs to check out, but they bring a lot of less-popular/more-underground acts. Aston Manor occasionally. There's also The Underground in Pioneer Square if you're into trance, although they occasionally dabble in other stuff if the DJ has some crossover (like Max Graham).
USC is the big promoter in town, they do festivals at the Gorge/WaMu Theater/Showbox/Tacoma Dome. Their event quality is hit-and-miss since they don't have any real competition (frequently have long lines to get in, etc.).
Listen to C89.5 on the radio because it's one of the few dance-music-only stations in the country, it's awesome, and it's run almost entirely by high school students learning about radio. Oh, and practically no commercials - they are funded by donations.
There used to be a third club, Foundation, that worked with USC and would bring in a lot of the more popular acts,
but... well...