Durham does not offer many contact hours for humanities/social sciences courses; I cannot say the same for other courses though. You have lectures and seminars/tutorials with the latter being every two weeks or so (probably course dependent), I have no idea what you mean by modern.
Living in Durham was OK, nothing special; if you like a quieter life then it is probably up your street. Although, it terms of diversity; I mostly noticed white middle class students to be honest, with a few Asian students.