There is a bar on titos road in Calangute called Cocktails and Dreams (ala The Film Cocktail). They flair with the bottles and have a wide selection of drinks. I like it in there good atmosphere.
If your on the beach the fresh juices are amazing because they are freshly squeezed. orange is so sweet as is strawberry. Ice tea is great too! I'm sure you'll be able to get them no problem.
Hope this helps