with a percentage varying between 30 and 40% among the fans and more or less 30% in total population, which corresponds to around three and a half millions of supporters in Greece. The club is overwhelmingly popular in Piraeus, where almost half of its population supports Olympiacos, while their support in the whole of Athens reaches 30% of the fans, making them the 3rd most popular club in the Greek capital. They are also the most popular club in the working class with a percentage of 37% and in all age groups, as well as among both male and female fans; the vast majority of their fans comes from the centre-left and centre-right of the political spectrum. Outside of Athens, Olympiacos is the most popular club in Central Greece, the Peloponnese, Thessaly Additionally, they have the highest average all-time attendance in Greek football, having topped the attendance tables in most of the seasons in Super League Greece history. Friendships Red Star Belgrade Spartak Moscow In 2006, Olympiacos was placed in the top ten of the clubs with the most paying members in the world, holding ninth place, just ahead of Real Madrid. As of April 2006, the club had some 83,000 registered members. Olympiacos and Red Star Belgrade fans have developed a deep friendship, calling themselves the "Orthodox Brothers". Usually, Olympiacos supporters from several fan-clubs attend Red Star's matches, especially against their old rival Partizan, and vice versa. More recently, the Orthodox Brothers have started to include fans of Spartak Moscow in their club. Olympiacos fans are renowned for their passionate and fervent support to the team, with the atmosphere at home matches regarded as intimidating. When they played Newcastle United at home in the 2004–05 UEFA Cup, the match was televised in the United Kingdom on Channel 5 and the guest commentator was former England international Tony Cottee, who was constantly mentioning how great the atmosphere was. During the game he was asked whether it was the most atmospheric stadium he had been to and replied: "I'd have to say it probably is. You hear a lot about various places and the atmosphere there but when you go you realise it's not all that... But this place is the real deal." The experienced Czech international winger Jaroslav Plašil paid further testament to the hostile atmosphere created by Olympiacos fans at home before his team Bordeaux visit the Karaiskakis Stadium,