【转发我找到的信息】1. Northern Viriginia Badminton Club, website: https://www.novabadmintonclub.com/
Though the club is a bit far, it's probably the nearest club with professional courts. They are open to all levels and are open 7 days a week. I'd recommend you try going at least once.
2. Montgomery County Recreation Centers Open Gym, Schedule: http://www.montgomerycountymd.go ... OpenGymSchedule.pdf
They have multiple locations in Maryland each with different hours. The closest recreation center to DC would be the Wisconsin Place Community Center which is open to badminton 9:30am-12pm on Saturdays though you might want to call them and check. I think the yearly fee for using these community centers is about $30 per year, which allows you to use all of the recreation centers in Montgomery County.
3. Evergreen Badminton Club http://www.evergreensports.net/where_to_play
This link that includes some other locations to play, so I would recommend checking those out.