Travel / Bars and clubs in Warsaw and best district to stay [18]

Hi,

I am coming to Warsaw on th advise 22nd February with a couple of friends.
We have provisionally booked the Praski Hotel whose address is :
61, Solidarnosci Avenue
03-402 Warsaw

We not sure of the best district to stay and having looked at a few sites are no closer to knowing whether to stick with this hotel or find another.

We basically want to be pretty central where everything is going on.
We like to party so somewhere which is fairly close to good bars/clubs or is it quite spread out in Warsaw and we would be having to catch taxi's about anyway?

Somewhere not too far from the airport as our flight leaves early on Sunday (or maybe it's a good thing if it's far away and we miss it! lol)

Could someone also recommend some bars/clubs please. Prefer somewhere not too pretentious. That Cinnamon sounds good but a bit out of our league prehaps and somewhere a bit more down to earth with friendly people and nice girls would be more up our street.

Thanks in advance to any information.