Tourist area has lots of loud bars, would personally recommend "Rumours" in that area for the partyish scene and City Pride for the quieter scene, right next to each other....
Around the castle theres a bar thats quite nice, forgot the name...
Otherwise drive along the strip, lots of place to stopoff....
On the coastal road, around Rumours there are loads of clubs, bars and cafes. You might like the Irish Pub for a busy pub atmoshere but if you want something sophisticated Cafe Brio is nearby in the new Vashiotis building. The English tend to favour bars showing live sports.