Neil Patrick Harris and David Burtka stepped out last night for the Art Los Angeles Contemporary 2011 Opening Night event with Brothers & Sisters actors Rachel Griffiths and Gilles Marini. The pair left twins Gideon and Harper at home while they enjoyed the colorful exhibit. Neil had his latest break from shooting How I Met Your Mother, while his costar Cobie Smulders was across town at a stylish Elle party with Rachel Zoe. NPH also had off last weekend, when he headed to San Francisco for the annual SketchFest to interview Muppet creator Jim Henson's son Brian. Neil and Brian have another common bond, as NPH's small-screen buddy Jason Segel is singing, acting, and dancing alongside Amy Adams in the new movie about Henson's famous puppets. Neil may get the opportunity to show off his own performance skills should he make another surprise musical appearance at this year's Oscar ceremony on Feb. 27.