There are two folders in your standard Band in a Box installation, under \bb\ called BLUEJAMC and BLUEJAMF. These folders contain some 80 files each.
What Are These Folders?Edit
They contain blues jams in C and F respectively. These files explore a number of blues and blues derived styles. They are useful for education and for practice. In addition, they serve as excellent starting points for more developed compositions.
How Do I Use Them?Edit
Using File|Open navigate to the folder and open a song. The names are not indicative of the style but the song memo will give a brief description of the progression and the style will be listed in the style box.