His & Hers drinks are always popular. These can be premixed and put in gallon containers behind the bar. You can offer them all night long or just during cocktail hour.
We recommend keeping it simple with 3-4 liquor options (vodka, whiskey, rum, etc). A couple of soda options and 1-2 juice options will keep your guests happy and prevent you from spending too much money and having lots of leftovers to pack up and take home.
Hard Seltzer and/or Hard Cider are fun options to add to the menu if you want a little more variety.