According to Namestat.org which is tracking the number of websites in the Alexa Top Million, based on the Namestat.org data on October 8th, 2014, .CLUB has more sites in the Alexa Top Million than any other new domain extension.
If you calculate the number of sites in the Alexa Top Million for each of the top 50 new gTLD, after .Club the next top 49 extensions average 16.6 sites per domain, one-tenth of the number of .CLUB sites.
All in all, .CLUB leads with more than ten times the usage of the average new gTLD. and more twice as much as the second new gTLD in terms of Alexa ranking in the top million, which is .XYZ .
But while .XYZ has over 600,000 registrations, .Club has just about 120,000 registrations. so pound for pound, .Club has a lot more Alexa ranked sites in the top 1 Million with 20% less registrations leading the pack.
Here are the numbers: