Using a private room in a pub requires you to use their party menu unfortunately so it won't be possible to bring your own nibbles. You have to book and pay per head. I have rented Goose Geeen Centre for my daughter's 2nd birthday this year which is more of casual children's party. They have a small hall and a big one. According to what you need , you also add an additional fee to use the kitchen part or full. In comparison to the hall that I used for her 1st birthday party , GGC is more affordable. It is quite stressing to look for a venue as I have learned that most of these places open their booking from when the new year starts ( so basically minimum of 6 months especially for summer parties which are over flowing!) Goodluck on your party !