If your looking for an entertaining brewery tour, check out Lakefront Brewery. We went a while back before catching a Brewer game, and I have to say it was my favorite one of all the tours I've been on. Our tour guide as hilarious and made it a really fun even with a group of over 35 people.
Otherwise there's Milwaukee Brewing company, Sprechers, Milwaukee Ale House, Horny Goat, Water Street, Rock Bottom, Stonefly. I haven't gotten to many of these yet because we live about 2 hours north, but they're all on my list to check out. One of these days I'll get to Stonefly to finally try that mustache ride pale ale!
Edit: Never mind, Just noticed today is, in fact, Thursday. Hope you stumbled upon a good spot! Let us know if anything was can't miss