I am afraid that the only conferences that would host presentantions about bitcoin are those organized by bitcoiners, who would never invite a critic, much less a hard skeptic. 

As for dinners, my dinner friends won't let me talk about bitcoin for more than 30 seconds each night.  And they are as surprised as you are that I be wasting so much time with this [ expletive deleted by self-censorship subroutine ].