Though not familiar with the area, I can take an educated guess as to why your home club may be aerifying.
1. Aerifying in June will allow for much needed oxygen to the roots as they begin their difficult summer. This will also allow gases to leave the soils that can be harmful to bengrass.
2. Because of the temperatures in June, it makes it VERY hard for any poa to establish itself in the aerification holes.
3. Relieve any stress and compaction that the grass has gone through this spring and also from any winter play.
4. There are not too many things better for turf than aerifying-It just allows the turf to breath a sigh of relief.
Just a few...more to come later....
Tony Nysse
Sr. Asst. Supt.
Long Cove Club
HHI, SC