In general, when considering hotel sales, some people refer to it as group sales, using the terms interchangeably. Many bed and breakfasts aren't able to offer group block discounts because of their size. If you don't have to deal with groups, count your blessings. They can be a logistical nightmare and occasionally they can be more work than they are worth.
That's why it's important to have a plan. I've provided some general guidelines that might be beneficial to you for considering group sales. Keep in mind that a fair amount of adjustment will be required to adapt this to your specific property.