well, i hope that you don't end up going back, sounds like you are trying to get back on the right track and get your life together.
but don't be so stupid with putting yourself in bad situations. you knew going to a bar was not allowed, but you went anyway. you probably knew that there was at least some possibility of that bar being one where a fight could break out, and you went anyway. you should know yourself well enough to not put yourself in those situations, and you should know that drinking is not good in combination with putting yourself in a bad situation.
just be smarter next time.