Noisy.
It was too noisy. So noisy that his head is starting to hurt. Not the music though, although usually when you go to a bar and the DJ is full-on, you would think that it would be the noisiest thing there. But, In this case, the noisiest thing wasn't the music, It was his company...
Joe agreed to come to the bar with Paul as an apology for accidentally flipping him to the ground and training his wrist. Joe had thought back then that Paul was an assailer or something like that and didn't hold back injuring his friend. Feeling quite guilty, he agreed to accompany him to this bar as a one-time apology, but he was beginning to regret it after all.