In the city where the good people of Prague consume more beer per capita than anywhere else in the world, where you can bathe in beer at Spa Beerland, where Europe's largest nightclub Karlovy Lazne charges less for beer than water, there were no prizes for guessing how West Ham's fans planned to ease their nerves ahead of the evening's European final.
Their plan was to get positively sozzled as the sunshine wrestled with the rain in the Czech capital. There was not a pocket of Prague unoccupied by West Ham, though you only needed to follow the sound of 'Irons, Irons, Irons' to know that it was the Old Town Square where most of the 20,000 visitors descended upon for a party.
Wading through a sea of scrunched tinnies, empty Jack Daniel's bottles and discarded takeaway boxes, you soon realised the claret of West Ham outnumbered the purple of Fiorentina ten to one in this hub of hysteria underneath the Marian Column of Prague.
Former forward Tony Cottee was among those soaking up the atmosphere, spotted beside Chris 'Knollsy' Knoll, the 58-year-old who protected the friends and family of the players when they were attacked by AZ Alkmaar ultras, his black eye having now faded. Choking up, he said: 'I'm an emotional guy. I wear my heart on my sleeve. I love my family, I love my kids, I love West Ham, I love my mates. It means the world to me to be here. I hope there's no trouble, because I might have to do it all again!'
The only 'trouble' which Mail Sport found was when, unprovoked, a bar of West Ham fans was attacked on Rytirska Street by thugs believed to be supporters of Fiorentina. Czech police say they made 16 arrests as a result.
Other than that, it was a day of celebration. There were topless Brits with tattoos of crossed irons on their chests, some of them telling Mail Sport they were debating whether to spend the £1,200 asking price for a second-hand ticket.
There were David Moyes masks, Czech flags for Tomas Soucek and Vladimir Voufal, and Brazilian flags for Lucas Paqueta. Cheers when Clive dropped the tray of Pilsners on his way back from the bar. Jeers when a family of four Fiorentina fans passed, the dad waving his flag as they serenaded him.
All jovial. All in good fun. All part of the away-day larks as most fans of the two finalists mixed well as the helicopters hovered above.
As soon as one song finished, another started. 'Just sold my car, to Lucas Paqueta,' went one chant. 'He eats paella, he drinks Estrella, Pablo Fornals,' another. And, of course, there was: 'One more year, one more year, Declan Rice.'
Beside the River Vltava, one West Ham fan spotted Mark Noble out for a jog and decided to join him, running alongside him with a can of Pilsner in hand. He asked: 'How you doing, Mark, you alright?' Noble answered: 'F****** sweet.'
Anywhere Irish was a magnet for the visitors. The James Joyce pub was packed. As was The Dubliner, the bouncers sending away revellers as they were 'too full'.
Rocky O'Reilly's endeared themselves to visitors by offering specialist cocktails. For 140 Czech Koruna (£5), you could have the 'Slippery Areola' (Sambuca, Baileys and Grenadine), 'Soucek Slammer' (Becherovka shot dropped into a glass of beer), or 'Hammer Blow' (Prosecco and Sambuca), among others.
The locals seemed to delight in the deliriousness, taking pictures of the flags taped to parked vans, one of which read: 'West Ham are massive.'
UEFA's designated West Ham fanzone, where Forever Blowing Bubbles was being blasted out of the speakers, was hardly pristine. Due to the previous downpour, the muddy ground resembled Glastonbury.
Fitting then that the one and only Chesney Hawkes was performing in his retro West Ham shirt, with fan-favourite former goalkeeper Ludek Miklokso also appearing on stage as supporters sang his iconic song: 'Oi, big boy, what's your name?'
These are the European trips that supporters dream of experiencing. West Ham's fans spent the day hoping they would win to secure more days such as this in the Europa League next season.
It is safe to say the visitors made the most of their invasion as even the waiters of restaurants in Prague's Old Town took to shouting randomly: 'Come on you Irons!'