You need to be a W Players Club member 55 or older and at the casino between 8 am and 10 pm on Wednesdays and Thursdays to claim. The $10 no deposit bonus for slots is part of the Seniors Day bonuses offered at each Four Winds land-based casino. Players at the Four Winds Casino in Michigan have a reason to celebrate with $10 Free Slot Plays available twice a week to qualified players.