Looking for a n affordable room in London

I am a professional male working in healthcare sector and I am 33 years old looking for an affordable room in London were I can live decently.
Ideally I would like to find a house with friendly and pleasant flat mates where we can spend time together and at the same time to respect each other's personal time.
Generally I am a clean and tidy person and I like to keep a positive atmosphere in the house.
I am a social person but not into much partying or drinking. I like chilling at home and I love boardgames-I am ready to teach you CATAN. I like meeting new people and explore more about their cultures, cuisines and interests.
I generally follow a healthy lifestyle. I used to be fitness instructor for 7 years and I exercise 4 times a week. I love healthy but tasty cooking and I can reassure you, you will taste some good Greek dishes from me :). I like to go out and try new cuisines or going for a walk to enjoy nature or the beautiful building around London.
I hope to find nice people to live together and spend a quality and time with each other - lets have some banter as well please :)