If you are meeting brokers and touring, I imagine there will be wining and dining involved. Are you buying anything? Are the brokers clients or are you the client? If you are the client, you can set the tone easier. My team drinks a fair amount at meetings, and customer dinners, I order a non-alcoholic beverage, and to be honest, none one has ever said anything. You can say you are on a short course of meds and you cannot drink if pressed. You can have a great time, and be sharp and focused and have fun on the trip all while staying sober! you got this, good luck