SERVICE WITH A SMILE: The Fabulous Pontani Sisters dance along to Los Straitjackets' holiday twang on the current tour. Another aspect of Los Straitjackets' carefully planned visual presentation is the Fabulous Pontani Sisters, a sexy dance troupe who swoop, shake and shimmy during many songs on the band's current tour. The group met the "sisters" in New York, back in 2000 , when they used to dance at a weekly go-go night held at the World Trade Center's Windows on the World Restaurant. "The Pontani Sisters bring something original to it," Angel says. "They're not just doing a paint-by-numbers thing from the past. [They're] bringing some new energy to it, but with perfect attention to details. What cracks me up about the Pontanis is they always have a smile. What rock audience has seen this in the last 20 years? Always smiling, that's something from another era - innocence, but not real innocence - an antidote to all the fake anger and stuff. They've worked out six new routines for this Christmas tour."