Lined up among 14,000 fellow runners at six-thirty on a Sunday morning, I&amp;#8217;m wondering how this Rock &amp;#8216;N&amp;#8217; Roll Chicago Half Marathon will be &amp;#8220;rock &amp;#8216;n&amp;#8217; roll.&amp;#8221; Then the announcer points out a charity runner who&amp;#8217;s running for NORML. &amp;#8220;Ah, I think, the potheads are here. It is rock &amp;#8216;n&amp;#8217; roll.&amp;#8221; Turns out the charity [...]