If you are interested in learning about craft beers or just want to taste four different beers for $6. I would highly suggest Market Gardens Brewery tour. The tour does not happen at Market Gardens, but at the store located on 24th Street. Which is behind all the bars. It is also a great activity to do with people from out of town. The first time I went with my parents and the second time was with out of state friends. Both times my guest had a blast.
Tip: For the tour you receive 4 little coins. Each coin represents a drink (sampler) you can get. Generally, you only use 3 on the tour and 1 has to be used at Market Garden Brewery. However, that coin does not go bad. So, if you are busy, etc you can save the coins for later.
Outside of the bar tour the brewery itself, located on 25th, is a really nice place to hang out. When the weather is nice I would suggest going to sit out on the patio. The only down side is if you intend to only get drinks you have to go to the bar. So, it is a little bit frustrating when you are outside and have to keep going back in. But, overall this is a really cool place to go to.