Friday & Saturday, October 16 & 17:  Lahaina Plantation Days.  Celebrate West Maui’s plantation roots with entertainment by Hawai`i’s popular musicians and performers, food booths by Maui’s favorite restaurants, multi-cultural demonstrations and food samplings, a beer and wine garden, a MauiGrown Coffee tent, a plantation art gallery featuring works by well known local artists, keiki game zone, and farmers’ market.  Old Pioneer Mill Co. smokestack site next to 277 Lahainaluna Rd., Lahaina. 5 to 10:30 p.m. both days.  Admission is…