Does anyone else remember lock-ins? Those all-night gatherings that locked a bunch of elementary or middle school kids into a gymnasium or some other school-condoned space where kids would eat candy, play games and wreak havoc until their parents came to pick them up? This year for its 35th birthday, the Dallas Contemporary hosted an art lock-in, only this time you could come and go as you pleased. Oh, and there was booze. For 35 hours straight, the ultra-hip West Dallas art space hosted bands, comedy shows, temporary art pieces, performance art, early morning yoga and anything else they could dream up to keep a bunch of drunk arty adults occupied. The crowd ebbed and flowed, peaking around 11 p.m. and tapering off around 3 a.m. only to pick back up as the midday sunshine arrived Saturday. And no matter which hour you stuck around till, it was much cooler than the lock-ins of yesteryear.