New England Patriots Jason and Devin McCourty hosted the annual Tackle Sickle Cell Casino Night at Royale on Monday, a fund-raiser for Boston Medical Center and Next Step, a nonprofit that offers support for young people with life-threatening illnesses. More than 500 guests attended the bash. The twins got decked out for the occasion, with Jason, the cornerback, rocking a fine navy shawl-collar jacket, and Patriots safety Devin sporting a red brocade and sharp bowtie.