The founders of Tacl - or The Advertising Club for Lads, to be precise - wish to remain anonymous.
It does not pretend to be a serious organisation with industry-changing objectives. Its motto is simply: "Gender, not agenda."
Normally, Diary would brace itself for a flurry of news about events and activities to which it can invite non-members to attend and advertising luminaries to speak.
However, so far no such news has been forthcoming. Perhaps the name provides the clue to its raison d'etre? One observer suggests all Tacl has achieved so far is a few nights out down at the local boozer to talk about sport.
Despite its lack of gravitas and profile (it has been in existence for more than a year), the idea has a fan in the Miles Calcraft Briginshaw Duffy co-founder Jeremy Miles.
He said: "I had the idea for Tacl when Helen (Calcraft) became the president of Wacl. The criteria for admission were obvious and I was going to be the president and Rupert Howell the honorary secretary. However, Helen was against it. I think it's a very good idea, but I can't take the credit for this one."
Those interested in becoming a member can send an e-mail to email@example.com.