BECOME A PART OF THE BOOMARANG DINER FAMILY. Reasons to join the Boomarang Diner Family. Be appreciated for the skills you have, the skills you develop in yourself, and the skills you develop in others. All Boomarang Diners close at 9pm, and are closed or only open until 2pm on Sundays. More than 50 restaurants located across Oklahoma, and we are continuing to expand. Immediate eligibility for medical insurance. Local Community Involvement. Enjoy...