Germany
If you cannot do without Guinness and pub grub then head to Saints & Scholars on Wilhelm Strasse, a modern variation on the Irish pub theme but with a large outdoor sitting area - tell Darko I sent you.
Saints & Scholars Irish Pub, Wilhelmstr. 44 (07071) 25 64 08: 25 minutes or so from the train station.
Try the Neckarmüller restaurant and bar at the Neckarbrücke (Neckar bridge) - sit inside for hearty German food including the local Swabian speciality, Maultaschen (literally "mouth-bags") like large Ravioli with a spinach based filling, or sit outside at the river's edge and sip the house brewed beer into the (hopefully) warm summer evenings.
Right beside the Neckarbrücke.
Search Been there