I often get asked for the Love Theme from the Titanic…it sank, he died, it never seems appropriate to me, but well, people have special connections with music regardless of what you may think so I got the piano sheet music and wrote myself an arrangement. Another one is “I don’t know how to love him”..well,why are you marrying him then! That one always gets giggles and silly comments at the reception (often quite rude!). The most bizarre request, was the person that wanted the “wedding thing” and when I asked them what they meant and to hum it they hummed the….funeral march…
Well, back to your original topic, I find that medieveal and Renaissance music is lovely for weddings and receptions. There are some nice books out there and there are some good arrangements in the Kim Robertson books. Her Celtic harp solos has some Medieveal and Renaissance tunes in it, as well as celtic ballads and airs.