We toured the offices of millennial media sensation theSkimm, where employees get tons of free snacks and Champagne

Sarah JacobsTheSkimm's office was decked out for the startup's fifth anniversary.As we wait with anticipation for the elevator doors to open at the New York City headquarters of theSkimm, we're immediately greeted by heart-pumping music.

The playlist: songs that were popular in 2012, the year that Carly Zakin and Danielle Weisberg sent their first email newsletter as theSkimm.

These days, theSkimm has more than five million subscribers to its daily sum-up of the news. It has raised more than $15 million from investors including 21st Century Fox, RRE Ventures, Greycroft Partners, and The New York Times.

The walls are painted bright teal, hundreds of books line the walls and serve as makeshift tables or stools, and comfortable couches populate meeting spaces. Champagne and snacks are present in equal amounts.

The team at theSkimm assures us the decorations and music are not typically this overwhelming, but that the office does enjoy a good celebration. This time around, they were celebrating the fifth anniversary of the startup's founding.

Here's what else we saw during a recent tour: