The other day I was in my car driving around and I experienced a "song in your head" moment with Mein Vater war ein Wandersman (Der fröhliche Wanderer) from German class circa 1998. It was part of our compulsory repertoire, however hearing more of them piqued all of our desires (like Himmel und Erde) to sing them more. After getting that in my head I was craving going to a German beerhall and swinging steins.
In the same vein while drinking one of the best oktoberfest beers during September is:
Beirut - A Sunday Smile
This is a great waltz, and waltzes make for great tunes while holding a litre and rocking back and forth while staying on your feet because the entire bar is swaying like kelp in a constantly changing tide.
Do you have any pub songs? I'm looking forward to having a pile of mates pinting away.