Most people would choose to hang out at the beaches like in Lumut, visit the Menara Condong in Teluk Intan or just go to the museums, or even go visit the guas. The best place to 'lepak' that I recommend would be IPOH PARADE on Friday afternoons and JUSCO during the weekends.
What is cool about Ipoh is that the clubs keep increasing and keep making it more of a place of entertainment. It is almost like a replica of Kuala Lumpur but more culture.