Every evening, the halls empty out as the coyote girls dance outside in the stereo zone.

Hundreds of visitors, almost all men, besiege the pickups used as stages for the sexually-arousing dancers. The vehicles belong to various car stereo brands and shops.

With cameras or mobile phones in hand, visitors take pictures of the girls up close and even up their miniskirts. The dance show is presented from 6.30-8.30pm.

Following Her Majesty the Queen's recent concern about risque dancing at a Buddhist festival in Nong Khai, authorities are now seriously looking into ways to curb the rapidly growing phenomenon of coyote dancing.

The Interior Ministry has already asked governors to curb inappropriate displays in their provinces, especially at Buddhist sites and public events, while the Culture Ministry has proposed a ban on those under 20 from working as coyote girls and a halt to all such performances at certain places.

"Some booths are so popular with the dancers dressing in sexy bikinis, and they gyrate and posture wantonly," said a photographer who visited the exhibition yesterday.

Ladda Tangsupachai, director of the Culture Watch Centre, said she had not seen this year's motor show dances, but the vehicle presenters - known as "pretties" - were dressed well and in not too revealing clothes as in previous years.

She said various motor show organisers had cooperated with the Culture Ministry's request to keep their pretties and coyote girls in check for sensible images. However, she would soon send officials to scrutinise the exhibition.