By far my favourite place in Nago. It opens at 4:20 PM, the decor is fantastic, drinks are superb and people even better. There's a pool table, foosball table and other board games you could play. The music they play is one of the best I've heard in a bar. It's not the mainstream commercial music we listen to but jazz & reggae. It's a perfect place to chill after a nice day in the beach. I tried the Pina Colada there and it was well made.
If you're in Nago and you don't visit Jammin, you're missing out on something.