Karaoke at my wedding: is this a terrible idea?

My partner and many of our friends adore karaoke. We've talked about having karaoke for half an hour to forty five minutes of our reception (our reception will be five hours total including a cocktail “hour”). We've mentioned this to a few people and have gotten mixed reviews. Some people adore it, others can't keep their eyebrows from reaching their hairline.

Is there a particular time that it makes sense to do something like this? I definitely think it should be towards the end of the reception but don't really want to end our party with karaoke. And is there a way to ward off those that are tone deaf? I'm also a bit concerned about song selections that may be offensive to grandma.

-kah71

Well, first we'll say this: If wedding karaoke is a terrible idea, you're in great company!

You might want to consider a few factors like…

Having a few planted friends to sing pre-selected songs and limiting the selection of tracks.
Also, for the sake of your non-singing guests, make sure there's a place for guests to go if they want to opt out of the karaoke and just chat.

We'd love to hear from those of you planning to belt it out at your receptions: how'd you manage your karaoke logistics? For those of you married types who did karaoke, what were your biggest tips for wedding karaoke success?