Unless your old employer has a restraining order keeping you away from his property or him indivdually then I really can not see any way that he can keep you from entering in to a public establishment anywhere.  Be careful when you go to the bar that your behaviour can not be seen as any form of harassment.  And that when you are there you are respectful of property.  If your ex employer can not point to any behaviour that would give rise to the need for a restraining order against you then are entitled to roam free. Just because he may not like you there does not mean that he can limit your freedoms. Good luck.