The construction of this project was fairly easy.
The bi-fold doors were a stock item at Home Depot. Unfortunately, the closet opening didn't quite match any of the stock sizes, so I had to take about 1/4-in off each vertical door edge.
The work surfaces are all 3/4-in plywood. Since both ends of the closet are angled, I created a template to cut the plywood to size. The rounded end of the secondary work surface was cut with a sabre saw. All exposed edges of the plywood were covered with 3/8-in thick screen (edging). I was somewhat concerned with how to cover the edge of the rounded-end work surface, until I found a VERY flexible synthetic wood screen at Home Depot. Cleats were screwed to wall studs to support the primary work surface.
Locating and installing the lazy susan was somewhat of a pain (too difficult to explain, but getting the screws in place was not fun), but carrying the two joined work surfaces back through the house and putting them in place was a nightmare (a very tight fit, and the lazy susan didn't make it any easier as the two boards kept moving on me). I should have either asked for help, or been a little smarter by clamping the two work surfaces together.