If you've ever picked up a guitar at all, and certainly if you have ventured to write a song, over the last 50 years or so, there is a decent chance that you yourself have played one of Bob Dylan's songs. To cover Dylan at one point or another, in public or in private, is almost inevitable for pretty much anyone making rock or roots music. But for the last 10 years, Jon Houlon (of the band John Train) and Kenn Kweder have elevated this simple and oft-repeated act to the status of communal event with their annual Bob Dylan Birthday Bash at Rembrandt's in Fairmount. Tomorrow, the great man turns 75, and of course, Jon and Kenn and many, many of their friends will be there to perform and celebrate. We asked Jon a few questions about the how's and why's of their million dollar bash.