If you are travelling to Peru then you are most likely going to be heading to Lima. Lima nightlife is a lot of fun. Some of the cool places to hang out in Lima after dark are located in the districts of Miraflores and Barranco. Limeans love to party and if you know some locals you will have a great time there. Food is wonderful, people are very friendly.
If you are looking for strip clubs then there are just a few of them in Lima.