One reason programmers dislike meetings so much is that they’re on a different type of schedule from other people. Meetings cost them more.
There are two types of schedule, which I’ll call the manager’s schedule and the maker’s schedule. The manager’s schedule is for bosses. It’s embodied in the traditional appointment book, with each day cut into one hour intervals. You can block off several hours for a single task if you need to, but by default you change what you’re doing every hour.
When you use time that way, it’s merely a practical problem to meet with someone. Find an open slot in your schedule, book them, and you’re done.
Source: Maker’s Schedule, Manager’s Schedule