Although the mindset and perceptions encountered during the so-called psychedelic experience can be illuminating or damning—depending on one's personal point of view—experiencing jazz can be a totally different kind of head trip. Some aficionados of the genre attest to the fact that they enter a sort of trance while on the jazz train. This effect is made even more formidable if cool jazz is being played. When players jam to progressions that involve seconds, sixths, thirds and ninths, listeners can be guaranteed of an alluring aural experience that stretches sonic boundaries and begs one to ask for more. Getting your fill of this so-called jazz music has never been easier in this town, thanks to the folks over at Entourage Jazz. Led by vocalist Emerson Corley and featuring some of the premier musicians around town, the ever-evolving ensemble has helped redefine jazz—and its audience in our humble burg. Entourage, featuring the subtly shocking sounds of the likes of pianist Roger Baker, bassist Maren Hatch, drummer John Bartlit and guitarist Dimi DiSanti, has a gig on Friday, May 5 at Hotel Andaluz (125 Second Street NW). They'll be laying down standards and favorites from the big book of traditional and cool jazz; it's music that one can dance to or just sit and contemplate as time goes by and dinner appears from the hotel's superior scullery. Entourage begins their weekend journey into jazzland beginning at 7pm. It's free to join them for this 21+ soulful sojourn, by the way. But if you do wander off into a trance, make sure and tell the waitstaff it's the music and not the wine doing you a much sought-after sonic solid.