I'm sometimes tempted to put one of my earphones in at work to quietly listen to music, but wanted to find out the etiquette around doing this. I've done it before during the period in between Christmas and NYE when we're operating on skeleton staff and I can not see another person unless they walk past (and if they stop to talk I immediately take it out). However today, my 3 colleagues that sit in my area are here (not in my department, little to no interaction through the day apart from pleasantries) but my Manager isn't here, who I have the most interaction with through the day. I'm surrounded by chatter boxes though which hugely distracts me, and I think I could concentrate better with music.
So how would you feel about your colleague doing this (keep in mind it's one headphone, the ear where people approach me from would not have a headphone in it) and do you do it yourself?