There are many different forms of blues: the Delta style of Robert Johnson, the hard Chicago blues of Buddy Guy, the Texas swagger of Stevie Ray Vaughan and the psychedelic blues rock of Jimi Hendrix.
In general, blues jams are a good opportunity for some widdly soloing, but remember that a great deal of any jam session will be spent on rhythm duties. And, rather than chopping away on basic chords, ...
The minor pentatonic scale is a fantastic scale to jam over a 12-bar blues with, but by adding a few more notes you can infuse your blues with the slick sounds of virtuoso blues-meisters such as Joe ...