In sharp contrast it will be business as usual for tens of thousands of American soldiers stationed in the region, while others, notably Muslim US expats and aid workers, plan to spend the tense wait in quiet contemplation.

Hotels from Hanoi to Hong Kong were booked up for get-togethers, featuring events such as mock ballots, debates and guest speakers intended to promote democracy as events unfold on big screens.

The US embassy and American Chamber of Commerce in China will host a party for about 1,000 mostly Chinese people at a Beijing hotel from 7:30am Wednesday, with similar bashes being held in cities across China.

In addition to free food, party-goers will be able to watch election day coverage, while computers will be set up for people to go online. Mock ballots will be available for Chinese guests to vote for the candidate of their choice.

"It's really an opportunity to show how democracy works," said a US embassy spokeswoman. "It's a way to give us an opportunity to explain the election process to our contacts."

Guests include Chinese foreign ministry officials, university scientists, military personnel including generals, deputy ministers and poets.

Expatriate Democrats and Republicans will make a rare display of unity in Hong Kong, giving speeches at a party organised by US trade, political and diplomatic institutions.