What’s your national “Last Call” song, the big epic cheesy sentimental song everyone knows to belt out together when the bar or the club is singing,

So far I'm aware of two:

• Stad i Ljus in Sweden.
• Le Connemara in France.

Other possibilities:

• I hear Me Voy works that way in Spain, and it certainly has that kind of vibe, but I can't confirm from experience.