After 11+ years of weddings, here is my best advice on genre’s for weddings: Stay classy uptempo for cocktail hour, Slow it down classy for the start of dinner, start bringing the tempo up slowly as soon as the last person gets their plate. Once the dancing starts throw out a set, I usually go 4 -6 songs of uptempo current, then a slow song or two for the couples, then pick another genre and do a few and see what happens, after the 1st set i usually just read the crowd from there.
Although I do have experience none of this is set in stone. Weddings are more about catering to the BRIDE & groom than anything. Whatever they want give it to em!