Trying again over cocktails! Trump gabs with world leaders at the NATO summit, while Melania makes nice with Merkel after her husband's excoriating morning attack on the German leader

• Trump joined world leaders at the Art and History Museum in Brussels
• He and First Lady Melania Trump were greeted while a jazz band played
• Waiters carried trays with white wine, but neither Trump nor Melania grabbed one
• He could be seen smiling and chatting amiably with world leaders
• Melania, who speaks German among other languages, spoke one-on-one with Germany's Angela Merkel 
• She changed out of her navy blue Calvin Klein dress into a white $7,450 Elie Saab dress
• Earlier Trump posed for a 'family photo'
• He demanded countries DOUBLE defense spending to 4 per cent of GDP
• Early he trashed Germany at a breakfast meeting when Merkle was not present 

After a day filled with tension and fissures in the powerful NATO military alliance, President Donald Trump and First Lady Melania Trump gabbed with their counterparts at a cocktail party with a jazz band.

The pair arrived at a cocktail party with fellow world leaders and spouses at Cinquantenaire, a park designed in the 19th century. 

The first lady wore a $7,450 Elie Saab white patterned dress, changing out of a navy blue dress by Belgian designer Raf Simmons for Calvin Klein.

First Lady Melania Trump leans in for a kiss to greet German Chancellor Angela Merkel at the Park Cinquantenaire 

Merkel, with a glass of wine in one hand, chatted with Melania after her husband tore into Germany

Leaders sit for a dinner of NATO heads of state and government at Park Cinquantenaire in Brussels

Belgian Prime Minister Michel's partner Amelie Derbaudrenghien, U.S. first lady Melania Trump and French first lady Brigitte Macron are seen ahead of NATO spouses dinner

Trump could be seen gesticulating as he spoke with NATO Secretary General Jens Stoltenberg, whom he complimented earlier in the day for being sympatico with his pitch for greater defense contributions.

He also chatted with German Chancellor Angela Merkel, following their bilateral meeting.  That followed the harangue he delivered against Germany at a breakfast meeting at the start of the summit when she wasn't present. 

The event was held at the Art and History Museum, and people were able to mingle outdoors. En route, they passed a triumphal arch. 

Later it fell to Melania to mingle with Merkel.  The two spoke at length. The first lady, a former Slovenian model, speaks German among other languages.

Waiters carried trays with white wine, but neither Trump nor the first lady took a drink at the start of the party. Trump doesn't drink alcohol.  

President Donald Trump, center left, and first lady Melania Trump, center, walk with Estonian Prime Minister Juri Ratas, right, as they arrive for a working dinner. NATO leaders gathered in Brussels Wednesday for a two-day summit to discuss Russia, Iraq and their mission in Afghanistan

At one point during the party, Trump held court, speaking with NATO Secretary General Jens Stoltenberg, while U.S. Secretary of State Mike Pompeo stood at the edge of a circle with his hand in his pocket. 

The first lady stood nearby. Later, Merkel joined the group, while Trump spoke and gestured to both his wife and Merkel. He appeared to listen intently as Merkel responded.

Earlier, Trump lambasted U.S. allies for routinely failing to meet a 2 percent goal on defense spending.

At the NATO summit, Trump demanded that they raise their contributions to 4 percent.

'President Trump, who spoke first, raised the issue not only to achieve 2 percent, today, but a new barrier - 4 percent,' Bulgarian President Rumen Radev told reporters, according to the wire service Reuters.

Bloomberg omitted the part where Radev said that Trump spoke first and added a claim from the Bulgarian leader that the U.S. president left the meeting immediately after his own remarks.

Kiss and make up P: U.S. first lady Melania Trump kisses Canada's Prime Minister Justin Trudeau as they arrive at the park of the Cinquantenaire. Trump slammed Trudeau at a recent G7 summit

LETS PARTY!President Donald Trump and first lady Melania Trump are welcomed by Belgian Prime Minister Charles Michel and his partner Amelie Derbaudrenghien, left, as they arrive at Park Cinquantenaire in Brussels on Wednesday, July 11, 2018

Radev charged: 'He just left after he announced that.'

That exchange followed a morning appearance where Trump went after Germany for spending just a ‘little’ over 1 per cent on defense. He also called Germany a ‘captive’ of Russia and slammed a German-Russian pipeline project.

Germany is totally controlled by Russia,' Trump charged. 'I think its a very bad thing for NATO'

Merkel responded that her country is 'independent.'

The two later held a bilateral meeting which Trump lauded as ‘great.’

'We’re having a great meeting. We’re discussing military expenditure, we’re talking about trade. We have a very, very good relationship with the chancellor. We have a tremendous relationship with Germany,' Trump said.