Sure! We meet on a monthly basis in the basement "speakeasy" bar of a local pub. There are between 8 - 15 of us that are part of the group, with about half being pretty serious homebrewers.
Each month we have a set style or two, depending on how many beers. This month is English Brown Ales and Porters. Our study group organizer sends out study material and links. Usually to podcasts, the BJCP guidelines, etc for the group to review prior to meeting.
He goes to a couple local bottle shops and attempts to find a commercial example of each of the categories, as well as requests examples of homebrew from the group.
Members of the group volunteer to be the "subcategory" expert. Usually the person who brewed homebrew example, or someone who has previously brewed or researched the style. Sometimes it's as simple as reading the guidelines, and other times it turns in to a brewing discussion, depending on the style and level of expertise and interest.
We go thru and sample each of the beers while we're discussing, comparing the commercial examples to the homebrew examples.
At the end of each session we judge a beer or two for practice, then discuss our scores and comments.
We also started our study group off by doing the Siebel off-flavors kit and then were planning on doing it again right before the tasting exam which is scheduled for some time in mid 2014 in the Pittsburgh area.
If there's not a study group in your area, or are just looking to expand your knowledge, check out -
http://www.wahomebrewers.org/files/fall_2013_kent_classes/Fall2013KentBJCPClassesAudioRSS.xml This club has compiled a ton of awesome content.
Let me know if you have any other questions. Cheers!