The 12th Aerobics Marathon on Aids at Amari Watergate Hotel’s Ballroom, on the 6th floor, was held on Sunday 28th September 2008 from 13.00 – 16.30 hrs, to raise funds for charitable causes, firstly Chalerm Prakiat HRH Princess Siridhorn School, which supports the education of children whose parents have very tragically passed away due to HIV infection, and the second beneficiary is Baan Gerda, the Children's Village project, which supports HIV-infected orphan children in Nongmuang, Lopburi province.

This charity event is aimed at encouraging people to make merit and exercise for health, with a 3-hour aerobics marathon, led by many famous instructors, such as Bankchart Kaewchompoo, Jirayu Somyoo, Ladda Pramote, Yodchai Ymmakup, and more. There were over 900 aerobic participants, including celebrities, along with the contest award to win Best Female & Male Dancer, Most Creative Costumes and the team with most participants. They were able to have fun, get fit and feel virtuous, all at the same time!

The total amount raised from the 12th Aerobic Marathon on Aids and the 11th Amari Watergate & BMW Thailand Midnight Run for Charity is 2.8 million Baht.

The 13th Aerobics Marathon on Aids is scheduled on Sunday, the 27th September, 2009 and over 1,000 aerobic lovers are expected to join in.