Traveling to Kuala Lumpur and would love some information

As i said me and a few of my friends will be visiting Kuala Lumpur later this week. I'll be getting there by myself this Thursday, and my friends will be arriving Friday. We will be staying until Monday. Any suggestions of exciting things for us to do around the area? We don't mind touristy stuff and are open to anything, we also enjoy drinking. Any suggestions for me to do on my night alone as well? Thanks!