Periodic reminder that if you’re in a hotel where the blackout curtains have an annoying gap and won’t stay closed, the hangars with the clippies are great at holding them together so you can actually get some darkness and sleep.
@TindrasGrove having stayed in hundreds of different hotel rooms from cheap and skeezy to 5-star, from homey B&B to corporate, I've never had this problem.
Every place I've been, the curtains have all had a top/bottom flap orientation. Once you figure out which is which, you need to pull them closed in the proper (in towards you/out towards the window) direction. If you do, they'll nicely overlap every time.
Oh, and pack a lightweight sleep mask, because the odds are good that the freaking hall lights and 16 little stupid LEDs around the room will make curtains pointless.