Yes, had you included that info in the initial post, I would not have responded the way I did. Given that information and the fact that you state you do not want to bring them to court, you should inform the tenants and the sublessee that this is not acceptable and he/she must leave. Work out a timetable with them if you can, maybe on the order of a week or two. If they refuse to work with you informally, you will need to take formal eviction action against all of them for violation of the lease. You really either have to work it informally or legally; half way in-between probably won't cut it.