Have been doing a bit of investigation on popular bars when I will be in Sri Lanka, it always amazes me to which corners of the earth that the Irish get too.
#1 Entertainment rating out of 32 on Lonely Planet in Columbo
Clancy"s Irish Pub
Colombo's stab at Irishness offers pub grub and a variety of beers and ales, including Guinness. It's a popular spot, with regular quiz nights, live music on weekends and a few couches to sink into. All drinks are discounted 50% during the daily 6pm to 8pm happy hour. Long pants are required attire.