To music only she can hear, Ash Gruneerg dances under the National Gallery of Victoria's kaleidoscopic stained glass ceiling, shuffling to the soundtrack in her head.
But she's not alone.
Ms Gruneerg is among hundreds of people lost in their own world at the NGV's Silent Disco, choosing their own tunes on a headset to waltz, pop or rock to.
"It's cute, it's carefree. Everyone is doing their own thing, but it's nice that we can all still do it together," Ms Gruneerg told AAP.
"It's a nice community thing to do. No one is judging."
Throughout White Night, Melbourne's sunset to sunrise arts and entertainment spectacular, dancing is one of the major drawcards of the event.
In what he calls a uniquely personal experience, Silent Disco organiser Paul Rosenberg says dancing, even in silence, always brings people together.
"Everyone can get up and dance," Mr Rosenberg said.
"It's very unifying because any age group can get involved and listen to their own genre of music."
But the State Theatre is not the only place to get a groove on.
Federation Square is also joining the party, with an all-night exhibition I Could Have Danced All Night playing a range of world music for revellers to jive to, from rhythmic West African beats to Polynesian sounds to the sensuous Spanish salsa.
And for those hoping to waltz to wedding bells, lessons teaching the Beyonce Single Ladies (Put a Ring on It) will also be held in the early hours of the morning.
In its debut last year, White Night captivated more than 300,000 people as crowds flocked to Melbourne's CBD for the all night display of art, music and theatre.
The crowds tripled organiser's expectations.
This year, more than half a million Melburnians are expected to pour into the city, prompting the state government to add hundreds of public transport services to handle the influx.
Public Transport Victoria (PTV) has put on an extra 373 train and tram services for the evening's festivities, running every 30 minutes on most routes between the end of normal Saturday services and the start of the usual Sunday services.
But as the sun set over Melbourne's skyline, for many getting home wasn't the priority.
They're here to dance all night.
