I get a lot of cities because my high culture caused a revolt. Sometimes they are great acquisitions, sometimes they are more of a drain then a gain. I used to refuse the bad ones, then I got a better idea. I always accept the revolts.
Then if I like the city, I keep it. If I don't and I am on good terms with the previous owner, I offer to sell it back to them. (I love selling them something they rightly owned in the first place!). If I have bad relations with them, I sell it to one of my allies, then it acts as a buffer between me and my enemy! Either way, I get someting for nothing. Last time I did it, I got chivalry when I was right in the middle of a war with the previous owner. Just in time to start cranking out knights and overwhelm my oponent!
Then if I like the city, I keep it. If I don't and I am on good terms with the previous owner, I offer to sell it back to them. (I love selling them something they rightly owned in the first place!). If I have bad relations with them, I sell it to one of my allies, then it acts as a buffer between me and my enemy! Either way, I get someting for nothing. Last time I did it, I got chivalry when I was right in the middle of a war with the previous owner. Just in time to start cranking out knights and overwhelm my oponent!