Ok, so, we did the headphone thing for a while, but we like to all talk to each other, and waving vigorously to catch someone's attention gets old fast. Likewis

Ok, so, we did the headphone thing for a while, but we like to all talk to each other, and waving vigorously to catch someone's attention gets old fast. Likewise, chatting in our IRC channel is not quite the same as talking directly. Concentration-wise, we all seem to do OK - if someone needs to zone out for a while, they still can put on headphones, or possibly just use all 5 votes to queue up 5 long classical pieces. Of course, every team is different, and interacts differently, so your milage may vary.