Vegas' new concert venue Brooklyn Bowl opened with the Roots March 15 at the new Linq. (Courtesy photo by Denise Truscello/WireImage)

Cake rocked Brooklyn Bowl on March 20. (Courtesy photo by Erik Kabik)

Sebastian Ingrosso DJ'd at Mandalay Bay's Light club on March 15. (Courtesy photo by Light Group)

Flogging Molly Celtic-rocked fans March 15 at the Cosmopolitan's pool. (Courtesy photo by Erik Kabik)

This is Flogging Molly. (Courtesy photo by Erik Kabik)

O’Sheas Casino has reopened, making frat and sorority kids, and grown-ups who are eternal Greek culturers, rejoice, and here on March 17 was a St. Patrick’s Day block party starring Brian “Lucky” Thomas (full disclosure, Brian is a friend of mine, he's awesome). (Courtesy photos by Erik Kabik)

Hey look, it's O'Sheas. (Courtesy)

DJ Dyro DJ'd March 20 at Light, where people twirl seductively from the ceiling. (Courtesy photo)

4067403

Mack Wilds performed March 20 at Haze club in Aria. (Courtesy photo)