best idea is to go as cheap as poss because unless you pay top whack the hotels are always disappointing so better off to start at the bottom. we always try and stay in either travelodge or premier travel inn in Kings cross area. should be able to do this providing it isnt half term in which case you will struggle or pay over the odds. they also limit you to 4 per room. take5 is a good website if there are 5 or more of you. do you have a budget?