The options available to you in choosing your wedding reception music are endless. It's easy to assume that all bands and discos are the same. Sadly, it's not that easy.
Standards vary widely.
In searching for the right service always contact several. Don't just ask the price. It is up to you to specify clearly all your requirements, although a professional service will know the right questions to ask. Always ask if a contract is involved. This, of course, will be a double edged sword in that if signed by both parties it is legally binding.