Blue Club is a bridge bidding system, developed mainly by Benito Garozzo.
It was used by the famous Blue Team and became very popular in the 1960s.
It has gained a strong following ever since.
The main features are: Blue Club is less fashionable these days but it was still used by a few pairs in the 2013 World Bridge Olympiad: VanProoijen-Verhees of the Netherlands, Cornell-Bach of New Zealand and Newell-Reid New Zealand.