They have set up over 30, 000 chat rooms worldwide to organise parties, talk about hobbies, play games or trade pictures of Pamela Anderson.

ECONOMIST: Word of mouse

The prime minister has called on the nation to "get on and have fun" on the day of the royal wedding, urging Britons to organise street parties.

BBC: Royal wedding: Cameron urges street party celebrations

He used to organise clandestine Eurovision Song Contest parties.

BBC: Five minutes of Eurovision fame

And political activity is still banned, so parties will have little time to organise and campaign.

ECONOMIST: Congo

They may attend events where Thais traditionally drum up votes, such as fairs, weddings and birthday parties, but they may not organise them.

ECONOMIST: Thailand