I sent this out today.  Consider adapting it for your setting:

Hello,

International Open Access Week (http://openaccessweek.org/)  is coming up on October 20-24, 2014.    Would you like to know more or wish to separate the hype from the common sense?   



I have considerable experience  with my own publications and advocating for open access participation, as well as warning the unsuspecting about questionable, unethical, or…