Amazing concert. On one hand, I'm glad they played such a small venue for their fans - they surely could have sold out a bigger venue. On the other hand, The Fillmore in Silver Spring is not my favorite venue to see a band. It's way too packed and the crowd jams up to the front of the stage because the stage is too low so if you're far back and short (my wife), you'll be watching the show on a monitor. Forget about getting drinks or going to the bathroom during the show - you'll never get your spot back.
And because your spot on the floor is so important, you'd best buy the Fast Pass and show up early to claim your territory inside. I'm doing so, you'll forgo buying merch until after the show - during which the staff will bark at you like you're a petulant child and chastise you for not buying your merch before the show. Some people shouldn't be given authority. I understand that they want to go home, but I want a t-shirt. The patrons are not the enemy.
Most importantly - Kid Kapachi and Nothing But Thieves were totally amazing - couldn't be more pleased with the performance. I highly recommend you see them in concert. You won't be disappointed. :)