We are planning a brunch on board a motorboat cruise for husband's birthday this June with 65 guests. The caterer is open to input and has suggested Dark and Stormy-iced rum and ginger beer and Tequila with grapefruit juice and bitters. My husband does not like spicy drinks so Bloody Mary's are out. Any thoughts for a boat worthy cocktail which would be somewhat novel and attractive to serve? In addition to the one cocktail, we will be serving white and red wine, champagne, lemonade and iced tea. Thank you so much in advance!