Peace, love and pre-millennial elation -- not to mention the distinct odor of a substance generally associated with such positive vibes -- wafted through New York's Theater at Madison Square Garden throughout Tuesday night's Jamiroquai show. And though a near-capacity crowd of club kids and neo-flower children danced in the aisles, Jamiroquai frontman Jason Kay seemed even more thrilled to be there than the audience was.

\\At a time when brooding grunge boys have given way to faceless DJs, it's refreshing to see a band -- especially a dance-oriented one -- so intent on entertaining. Without using tape loops or sequencers, Jamiroquai's ten-member live lineup played the nineties disco on "Travelling Without Moving" and several earlier hits, dipping into jungle, reggae, disco and funk to deliver a performance that was both spontaneous and engaging.

\\Much of the credit for that goes to Kay, who skittered frenetically around the stage as though he couldn't keep his feet beneath him. Smiling at the audience almost the entire time, he jumped around, flailed about and even walked on his hands to enthusiastic applause (impressively, he even kept his trademark big, fuzzy hat on his upside-down head). Aside from introducing songs, he didn\rquote t talk much, but he didn\rquote t need to; his joyful body language spoke volumes. Toward the end of the set, after fans in the front row pilfered a little Jamiroquai souvenir, Kay merely shrugged and grinned, saying, "Yeah, you can have it if you want it \endash - it's just a cup. Enjoy it." Such goofiness and modesty made up much of Kay's onstage charm -- and the lion's share of his band's appeal.

\\Jamiroquai's other members -- keyboardist Toby Smith, bassist Stuart Zender, drummer Derrick McKenzie and guitarist Simon Katz -- stood remarkably still. When Kay disappeared during an instrumental, the energy sagged. Didgeridoo master Wallis Buchannan filled some of the void by playing the unusual-looking and -sounding Australian aboriginal instrument (he also danced to several other songs), but he didn't work up the crowd the way Kay did. The three-piece horn section executed the occasional Temptations-style move, but didn\rquote t do it often enough.

\\Kay joked that his a cappella solo turn would be "fucking boring" and acknowledged the other players throughout the concert, but he made the performance his own with his showmanship and buoyant glee at being onstage. Before walking offstage, he uttered no less th