Hermione watched from a slid between the doors, but really couldn't see anything beyond the counter and definitely couldn't hear anything past the loud din of the shop's usual noises. It was the perfect place for this sort of meeting, though. She knew the backroom must have been seriously charmed for sound protection so that customers didn't hear the explosions that the charred side of the door told her must happen on a fairly regular basis.
When Fred ushered Neville in she thanked him, but she waited for Fred to leave, too, before she turned and gave Neville a quick hug. "I'm glad you agreed."