For the musically inclined introverts out there, K-Box is your happy place. This Japantown spot, which shares space with the boba shop Little Sweet, has completely private rooms that can fit anywhere from five to 14 people. Pack in with a crowd, queue up some miscellaneous throwbacks, and get up close and personal with the handheld microphones. If you get hungry, there’s a QR code to order boba, egg puffs, and even chicken wings from the shop upstairs.