The Starline Lounge has been dealing with the best kind of identity crises in the past year. While owner Curt Simms has slowly sallied forth with plans to open the former Denver Buffalo Company space as an upscale Mexican food restaurant called Cielo, the club portion has been cookin' for months. A few nights a week, the minimalist back bar fills with ever-evolving crowds who turn up for theme nights on a rotating calendar. Most of the time, "Brown Sugar" hip-hop events rule on Saturdays, while Friday was recently handed over to "Delicious," a woman-centric showcase for songwriters, bands and DJs. The place has an unsettled feel, like a shoe that needs some breaking in, but the dance floor is ample, the drinks are strong and the fan base is amorphous enough to stay interesting. The Starline may not be as polished as its Golden Triangle dance-club competitors, but it does the job just fine.