Virginia Madsen talked about the perils of on set wine consumption during Monday’s Variety Screening Series showing of “Sideways” at the ArcLight.Despite the warnings of co-stars, the thesp indulged in a suspicious spirit, then spent “several hours in my hotel room after that quite ill,” Madsen said, “and my teeth were like dyed purple. So I had this horrible panic moment that maybe I was going to get fired because of my teeth. So I snuck back to Los Angeles and had my teeth whitened. I tried the cherry juice after that.” Producer Michael London raved about Fox Searchlight’s hands-off approach to production. “They not only don’t call,” he deadpanned, “they don’t call back.” Sesh was moderated by Pete Hammond.