Conversation so far:
Why are the reunions mini reunions?
CANNOTANSWER.
when did the first mini reunion occur?
February 28, 2007.
Where did that happen?
Greenbelt 3, Makati City.
Was it a concert?
the official launch of the book Tikman ang Langit: An Anthology on the Eraserheads (2007) was held at the second level of Powerbooks bookstore in Greenbelt 3, Makati City.
Who wrote the book?
The book itself was compiled by Melvin Calimag and Jing Garcia.

Question: What was the second mini reunion?
Self-contained rewrite: What was the Eraserheads second mini reunion?