Great tour situation at the MKE Brewing Company: it's a beer in hand tour so you're getting 10 minute bits of info and then get a drink break to try whatever beers of theirs you want in your shiny new branded pint glass. It's all in one little warehouse, so it works well that way.
Best part? $10... Ours was thrown in as part of a pkg deal we got through The Iron Horse Hotel, where were staying, but if you're walking in off the streets it's $10. Essentially for all the pints you can consume in the hour and a half you are there. Not a bad deal.
Tip: book online. They do hold a certain number of tour spots open for walk-ins, but those go pretty fast. It seems to be a good way for people to start their MKE nights out so it's a popular gig.