Robin Thicke treats himself and his new girlfriend April Love Geary to a pampering session at Roman baths in New York

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It's based on the 2,000-year-old Roman model of hot and cold pools and spas with masseurs on hand to massage away the cares of the day.

And Robin Thicke evidently felt in need of a little relaxation as he treated himself and his new girlfriend April Love Geary to a pampering session at Aire Ancient Baths in the Tribeca district of New York city on Monday.

The obviously smitten 38-year-old singer is rarely seen without his 20-year-old IMG model girlfriend nowadays.

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Together again: Robin Thicke and his young girlfriend April Love Geary were spotted in the Tribeca neighbourhood of New York on Monday

The couple were spotted laughing and chatting as they strolled in the Soho district before they turned up at the luxury bath house.

April looked every inch the model as she showed off her fabulous figure in a blue, fit and flare mini-dress and black tassled sandals.

Her brunette hair were brushed smooth and tucked behind her ears so that it cascaded down her back.

Heading back in time: The Blurred Lines singer and his 20-year-old girlfriend were booked in for a pampering session at Aire Ancient Baths, based on the 2,000-year-old Roman model of hot and cold pools

She accessorised with a black bag that she slung over her shoulder and a large pair of sunglasses.

Robin was decked out in pop star black from head to toe in a polo shirt,casual trousers and sneakers.

Aire Ancient Baths is co-ed but insists on guests wearing swimwear...unlike the Romans who enjoyed their baths in the nude.

Hand-in-hand: The 39-year-old pop singer, who was decked out in black from head to toe, held on to April 

Guests can book two-hour sessions and Aire promises that no more than 26 people will be in the bath house at any one time.  

Robin and April recently returned to Los Angeles after a romantic break in Paris. 

But it seems they simply can't deep their feet on the ground as they jetted to New York just 10 days later.  

On the way out: April looked every inch the IMG model in a blue fit and flare frock with cutaway shoulders while Robin followed behind carrying a bag with their swimwear after their session

And the Blurred Lines singer may be ready to pop the question to his young love just a month after his divorce to estranged wife Paula Patton came though, according to RadarOnline.com. 

Robin and Paula, 39, who share custody of their 5-year-old son, Julian, announced their separation in February 2014 after 21 years together and nearly nine years of marriage.

'She is beyond livid that he is even considering marrying this girl,' a source told Radar, adding that 'Paula cannot stand April, and thinks that she is a total gold digger, but she is just keeping her mouth shut for the sake of their son.'  

Relaxed and happy: The pair seemed to have enjoyed themselves as they smiled while walking back to the limo

Not amused: Robin's ex-wife Paula Patton, pictured at the premiere of French Kiss at Marina del Rey Marriott on May 19, is said to be furious because he is mulling marriage to April, according to Radar

The source noted that April, who could be mistaken for Paula's doppleganger, already lives with the singer and 'has done everything she can to weasel her way into his heart, as well as his son’s heart, and it worked because they both adore her.' 

Paula is particularly angry because her ex is faithful to April — and he wasn't with her.

'What makes her most upset about all of this is that Robin and April have a sexually-monogamous relationship, which is something that Robin always said he would never have,' the insider added. 

Luxury spa: Aire Ancient Baths is based on the Roman system of hot and cold pools with masseuse on hand to massage away the cares of the day 

Meanwhile, model Cara Delevingne and singer-songwriter St. Vincent, aka Annie Clark, were staying at the same hotel as Robin and April and bumped into each other in the doorway as he left.

Robin didn't appear to recognise the two young women as he walked away and they didn't acknowledge him either.

Cara wore a black jacket with a rearing pink horse on the back, black skinny jeans and black caged high heels while St. Vincent was decked out in a striped mini-dress and a sleeveless white jacket. 

Do I know you?: Robin glanced at model Cara Delevingne but if he recognised her he didn't acknowledge it and neither did she as singer-song writer St. Vincent followed on behind

On his way: The hitmaker carried on out of the hotel as the model talked to a man in the doorway

Different styles: Cara wore a black jacket with a pink horse on the back, ripped skinny jeans and black caged high heels while St. Vincent was decked out in a striped mini-dress. a sleeveless white jacket and silver heels