* A Fall Family Fair is on tap from 2 to 6 p.m. Saturday at Marathon Farm, 27th and Master streets. There will be live music, pumpkin-carving and other fall activities, food, beer and a silent auction to benefit the farm, which grows organic produce for Marathon Restaurants and for a neighborhood farm stand. Purchase $1 tickets toward food (five tickets), beer (four) and kids activities (two).
* Opa (1311 Sansom St., 215-545-0170), the modern Greek restaurant-bar, has a fall menu featuring curried apple-squash bisque, an arugula and squash salad, and a lamb chop with pistachio puree. The restaurant also has started serving lunch weekdays from 11:30 a.m. till 2:30 p.m.
* Watch celebrity chefs in action (Jose Garces, David Boyle, “Chopped” host Ted Allen and more), talk with wine experts from Robert Mondavi and sample much food and drink this weekend during the Philadelphia Food & Wine Festival at Valley Forge Convention Center (1160 1st Ave., King of Prussia, gourmetshows.com), 4-8 p.m. tomorrow, 11 a.m.-7 p.m. Saturday and 11 a.m.-3 p.m. Sunday. $30 in advance ($40 at the door), ages 6-12 $5, under 6 free. Seminars, Chefs onstage series and VIP Cocktail Party are additional.
*Oh, you bake? Well, maybe not yet, but you will after attending the eight-week workshop series Adriane Appleby is teaching at Green Line Cafe (4239 Baltimore Ave., 215- 222-3431) starting Monday from 5:30 to 8 p.m. Appleby’s résumé includes stints at Amada and Betty’s Speakeasy. She’ll discuss pretty much every baked good going, from cookies to tarts and cakes. She also teaches single classes on Tuesdays from 5:30 to 8 p.m. Up tomorrow: cookies. Email firstname.lastname@example.org.