My advice is restricted to advice surrounding the general principles of law governing your issue and you should not act on this advice but seek further clarification from a specialist in your County.
If you aren't willing to give evidence against your husband for domestic/violence or assault this charge will be dropped. You will be a hostile witness so the cops won't go ahead with that one, even if some of the group gave evidence to say that your husband was choking/assaulting you, your indication to the police that you will not be giving evidence against your husband, should be enough for them to drop that.
Otherwise, he can be charged for public order,drunk in a public place offense, and perhaps affray. Affray is a more serious charge, my opinion is that they are limited to a public order charge, and if they have no witnesses, absent an admission, that can be dropped also. It seems there action rests with you. If they saw anything themselves, they can give evidence of what they saw.
Thank You for your question.
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