After your normal curtain speech (if you have one) please consider adding this on at the end to promote the Greater Boston Theatre Expo 2015!
"And I hope you'll come say hi at our table at the Greater Boston Theatre Expo on September 29 in the Cyclorama at the BCA. In addition to [company name], there will be 70+ theatre companies on site with all kinds of info about their upcoming seasons, plus ticket giveaways and other prizes. It's from 5-8pm and completely free and open to the public. If you love theatre, the Expo is your Woodstock."