Design a collaborative platform that brings together party hosts and guests to share responsibilities and make the house party a group effort. The platform should focus on productivity, automation, and practical applications without the use of AI-related solutions. Provide thorough step-by-step instructions for: 1. Creating a user-friendly interface, 2. Developing features to create and manage tasks, 3. Implementing options for assigning tasks to guests, 4. Allowing guests to volunteer for tasks or suggest additional tasks, 5. Incorporating a chat or communication system for real-time updates, and 6. Integrating event-specific details such as location, time, and special instructions. Consider the challenges faced by users around the world and suggest novel ideas to improve the party planning experience, making it more efficient and enjoyable for all involved.