Attendance at any film festival needs to be supported by a philosophy of zero expectations. The tenets of such a philosophy are a hope for the best possible outcome (a memorable screening of a film that would have otherwise been missed) tempered by little emotional involvement ahead of time and no entitlement to anything beyond ninety minutes of entertainment. Grinders seems to be inspired by Sportnet’s incessant coverage of poker events. The tales of anonymous Toronto poker players are balanced with an interview with superstar Daniel Negreanu about the life he lives in Las Vegas. Negreanu has long since outgrown …