Hacker Karaoke is located in the Rio All-Suite Hotel & Casino's Brasilia Ballroom
The Brasilia Ballroom is shared by Track 4 and CTF. Hacker Karaoke is in the Track 4 portion. Here's a handy dandy map if you're having trouble finding it:
The Brasilia Ballroom is shared by Track 4 and CTF. Hacker Karaoke is in the Track 4 portion. Here's a handy dandy map if you're having trouble finding it: