There are a couple of things you could do at night.
You could go down town to party with the locals at different bars. There's Club Bahia, Mr. Conga, and my favorite Mambo Jambo. Mambo Jambo has live music every wednesday night and is packed on a friday and saturday night.
There's a great happy hour and live band at The Mill resort every friday night as well.
You could go to the black hog bash at adventure golf (in front of La Cabana, at the sasaki highway)
The casino's are great as well. Seaport Casino is my favorite. With a nice live band.
You could also go dancing or learn how to dance.
If you want more info on the Kukoo kunuku check out their site. http://www.kukookunuku.com
They don't say which bars they visit. Maybe because they often change the bars they visit.