Roomshare
The advantages to a roomshare are mostly financial — you can get away with just £50 a week in rent. The disadvantages? Well, they'll become apparent when the alarm goes off two hours earlier than you'd like, or the pile of stinking laundry on your mate's side grows to the size of K2
Pubs — living and working
If you're planning on finding a pub job it may be worth looking into workplaces that offer accommodation as part of the deal - you might even get some free meals too. Living where you work is a good way to save on the cost of transport around London too.