Everyone shared calendars at my last job, and we'd use them to book time with each other for meetings. Once my boss booked everyone on my team for a client-facing meeting, which was pretty rare for us. The day of the meeting came and it was the one day of the month that I didn't wear jeans. I saw my colleague in the elevator and she was wearing makeup. We sat down at our desks and one of us remarked that no one had booked a conference room for the meeting, and then all our phones rang at the same time. We had, of course, all dressed up for a meeting over the phone.