My course closes 9 holes for a day to aerate, and 9 on the next day to do the other side. They do an amazing job too. There is definitely a big difference in how this course aerates compared to the last course I belonged to. The holes are much smaller in diameter and they use less sand. The greens still roll pretty well after aeration. Of all the courses I've played, this course does the best job I have ever seen.
My old home course took big cores out, and dumped what seemed like a dump truck load of sand on each green and spread it around....LOL
This is my old course after aeration.............(this pic is about 2yrs old)
Our greens have just been aerated at my new course....I might take a pic later today to show the difference. Hey, this could be a thread topic....post a pic of your aerated greens! LOL.....then we can all see the difference between which course does a good or bad job.