I’ll often choose an after-dinner drink, because I usually stuff myself during the main course. Maybe I’ll order an Espresso Martini. Or I’ll go full Dude and order a White Russian. Or whatever else looks good.
When stumped, I’ll ask the server for a suggestion. I try to give them something to work with, like “sweet”, “creamy” or “citrusy”.
I haven’t read the book. I’ve only read about it… but from what I know, I don’t think I’d go with “love story” either. Ick.