Are we allowed to go to a bar to drink with non Jews?
For sefardim it is halachically prohibited, as one of the laws that chazal gave us to separate us from the gentiles is not to drink beer etc. in the house of a gentile. A bar would be included in this. Even for Ashkenazim, it is not advisable and frowned upon for a Jew to go to a bar to drink with non Jews, for numerous reasons. The environment of a bar will pull him to befriend the wrong type of people, to relate to them when they are at their worst, and it can eventually cause him to do things that he would otherwise do. However from a technical halachic standpoint the actual drinking is permitted according to some poskim, as long as you know that drink is kosher.