Great post and true... Welcome here ... i underlined my favorite part and the most important for me ...
I think of a "blowing session" as a recording session, perhaps driven by the label, with a nominal leader and a team of sideman who are typically also on the label. It features standards and blues tunes, so everyone knows the changes and can roll with it. As stated above, some are great, many run of the mill, but as I find with just about any jazz album, there is often one brilliant tune (or sometimes just a solo) on an album that you are so glad you stumbled across. In some cases, one of the sideman has just discovered his voice and elevates the entire recording, making that the reason to listen to it. This is a such a fascinating genre..