Whenever there is a business party that occurs outside of the regular business hours, there may be alcohol served. These business people would like to relax and drink cocktails. However, there are usually certain types of cocktails that are served. However, beer may be served.
Sometimes, the company may hire a cocktail service and the service decides which cocktails they will serve. If the company must decide or they are picking up the cocktails, then they may serve sangria especially if this business party is taking place in the summer.
Another cocktail would be an alcoholic punch. Margaritas are usually a hit with business people. Usually, strong drinks are not included on the menu at a business party because it would be embarrassing to get drunk at that party.