Regularly Occupied Spaces

At first glance, it sounds like your meeting rooms, private offices, and open office areas would be regularly occupied spaces. If the kitchenettes, lounges, and printing rooms are not places where people stand or sit to do work, they are typically excluded. Print/ copy rooms where people go to pick up prints and office supplies would not usually be considered "regularly occupied" whereas a high-volume printing room where people operate the machines as part of their job probably would be considered occupied. For the open office areas, I think it's most common to include the circulation areas in and among the workstations, but exclude the main circulation area closest to the core. You may get different results with a daylight simulation or by taking measurements with a light meter - the prescriptive method is a pretty rough approximation of actual performance and the least accurate.

A LEED interprestion on a different, but related topic on 6/26/01 states that the area between work stations in an open office should be included in the regularly occupied space, but the corridors or transitions spaces that go around this area are not. It would be difficult to calculate using the prescriptive approach and exclude the area between cubicles. I agree with David on this and on the assessment of the other spaces. The prescriptive method is meant to be quick to use but isn't as accurate, telling or "giving" as the other methods.