London Flatshare party,
Great. You do have the right of veto though. Also you may feel uncomfortable about lending your room out. Neighbours need warning. You need to check your accommodation or property lease: if parties and/or smoking aren't allowed you might get stung on the deposit. Also get real: some nice middle class people with University degrees thieve as opportunistically as some people from any other walk of life: a party is equivalent to leaving for front door open and going out for the night.