We play at Loyola University's University Sports Complex on the fifth floor of Loyola's Freret Street parking garage (6329 Freret Street on Google Maps), and occasionally at Tulane University's Reily Center (scroll down).
Park on or near Calhoun Street.
Take the stairs or elevator from inside the parking garage (the doors facing Freret street in the Google street view image below are usually locked) to the 5th floor.
Tell the person at the front desk that you are here for badminton.
Once inside, head to your right hand side past the basketball courts until you see the badminton courts.