Anja Schneider: Room at the top

The rooftop events started in 2007 when, Anja explains, "We wanted to play during Sónar but nobody invited us!" Ralf found the hotel and was struck immediately by the rooftop's potential. The first parties were invite only, for friends and industry, and the gang wisely made an effort from the beginning to immortalise them in video and pictures: it was a three-minute YouTube clip of dOP's extraordinary performance in the swimming pool in 2010 that turned the event into Sónar's hottest ticket.

Now they do rooftop parties throughout the summer and even at other venues, but the Diagonal is the centerpiece and a home from home – all the Mobilee crew stay in the hotel, having breakfast with the guests who have come especially for the party. The party has evolved too – it's now possible to buy a ticket if you're quick off the mark, and Anja says she prefers the relaxed vibe of today over Sónar, with a crowd that is committed to seeing sundown together rather than having to reluctantly rush off to another event in the packed Sónar week. Indeed, if there was one way to describe the crowd today it's 'relaxed'. Dress is casual: a mixture of shorts and vests and the odd bikini at first, later outnumbered by skinny black trousers and neat, fitted tees. The music, supplied today by Leif Müller, Igor Vicente and Re.You fits the mood, familiar tunes at first like 'Bigger Than Prince' and perennial daytime party standby 'The Sound Of Violence'. But by 6.30 the music has settled into a chunky groove, a swinging remix of 'Short Dick Man' causing heads to bob while the thick knot of dancers by the pool start divesting themselves of their drinks to free up their range of movement.

By 9pm, Anja is bouncing at the front of the dancefloor, vodka and tonic swinging precariously as Leif plays his last tune, a Dead Centre remix of Jan Hammer's 'Crocket's Theme' from Miami Vice. The rooftop is jumping, the sun is setting over Barcelona and the Mobilee crew are together on the dancefloor, doing what they love, their passion undimmed after 10 years. Anja Schneider is relaxed.

Anja Schneider plays LWE NYD 2016 at Tobacco Dock on January 1