Amateur party planners, here's your guide to snazzy seasonal cocktail hours. On Sat., Oct. 15 at the Pittsburgh Public Market, Chef Kevin Costa teaches how to fix h'ors doeuvres and drinks, and offers a tasting. Part of the Allegheny Front Green Gathering series, the event features locally produced foods and drink ingredients. WYEP Morning Mix host Cindy Howes will share her specially selected playlist of happy hour tunes. Two seatings: noon and 1 pm. Advance ticket buyers save. For yours, click the WYEP link on this story page.