Does your tablet have a media player?
If not, download TuneIn, Slacker, WinAmp, VLC or some other app that will work with streaming radio. I would try VLC first.
http://www.videolan.org/vlc/download-android.html
Go to —> http://www.thestreamcenter.com/ - to find radio stations you can listen to online.
On your typical computer or from the radio station’s website, the streaming radio is often Flashed based, so they can feed you advertisements. This website will give you some alternate streams that don’t require flash and are ad free.