I honestly don't think entertainment is needed, so long as you have drinks, dancing and people to chat to!
The only entertainment at a wedding I've attended that I really thought added to the day, was one where they set up outdoor games in the gardens of the venue - welly throwing, croquet etc. That was great fun but obviously weather dependant!
I really wanted a band after attending my sisters wedding. They had a group called the John langan band who were amazing! Everyone was up dancing the whole night, but the expense was eye watering! 3,500 plus expenses, hotel and evening meal, as they travelled from Scotland to the lake district. We arranged a Dj through www.planmyceremony.com who included all lights and effects he dressed the venue with. Me and my wife love soul music and he even did us the perfect playlist which was nicely mixed with Disney and little mix for the kids who were there. It's tough to find someone reliable and talented but they did the hard work and it was amazing! Really made the night!
We've booked a DJ through the venue (we're not having any live music), a 10 minute firework show and we're also looking at getting a photo booth. I know lots of people have said these are overdone, but I love the idea of capturing all of my guests' photos and having them as a keepsake.
We had a caricaturist come and do drawings for people after dinner but before the evening kicked off - he went down really well and a lot of guests have kept their pictures so a nice keepsake for them to have xx
I'm def not a fan of them either, no magician, thanks. A professional organisation I belong to had one for their Christmas party entertainment a few years ago, and my ex husband had a work event with one years ago - both a big "no." Food, drink, conversation, and maybe some music later on, that's all I need at a wedding. I think anything else is honestly a waste of money. I haven't seen anything both novel and completely engaging done at a wedding in years.
Magicians seem to go down well at the weddings I've photographed.
I would second the magician suggestion particularly for the welcome drinks reception phase. They walk around and perform to small groups of people at a time and are amazing for adults and children. During the wedding breakfast I would recommend background music, so just recorded music or perhaps a strings duo/trio or a pianist or classical guitarist. A magician at that stage would be more awkward to accommodate at tables.