Event is in Boston next year. Hope they've figured out how to get roasters approved this time around. Last time it was there we could only get approval for electric sample roasters, limiting the classes that could be offered. Then again, there are a lot of options now that didn't exist back then. The right instructor (not sure they exist) could do something interesting with that.
Pro tip: When buying #chocolate from a new place, always buy the darkest, most bitter one first and let those in your house taste it. Once they've been trained to cringe just by looking at the label, you're free to buy the tastier stuff from that place.
Author of Typica software for coffee roasters.