Santiago, Chile

So I will be arriving in Santiago Chile in exactly ten days. I will be staying in at the Andes Hostel Monjitas 506 Barrio Bellas Artes. The place is really cheap and it looks pretty cool. It was recommended to me from a friend of a friend who stayed there before.

Does anyone have any ideas of what I should do? I am going to be there alone for roughly four days, so I am up for anything. I will be sure to scope out the Chilean nightlife. I was reading on tripadvisor.com about some clubs and this place called street machine sounds like it is a must see. Users compared to an Ibiza style club scene.

I also read that first time visitors should go on a bike tour to get the full grasp of the city and check out some breathtaking views. I hear La Bicicleta Verde is a great tour company to use. Does anyone have any other suggestions?