Kapital - This club is great, but only for a select demographic (Mainly 18-30 year old range). It's also a good place to meet other travelers/tourists (not only americans). Whats not good about it is the completely arrogant and rude bartenders and prices. Even if you aren't a huge clubber, make sure you visit the place at least once. The place is a spectacle inside. Be sure to get there by 1:00 am the latest unless you want to pay a heavy door charge and wait in line.
http://www.grupo-kapital.com/kapital/