A low-cost birthday party

I´m not sure how it started, but here in our area parents are now organizing children´s parties in public parcs. Last year, when I went for a walk in the parc with my little one, I noticed how a few parents were decorating a small corner of the parc with balloons and garlands. They threw a simple table cloth over the wooden table, put on food and drinks, cups and plates and the party was ready to begin. I never thought of this, but it seems like a great idea. The kids can run in the parc around while the parents chat and keep an eye on them. Kids love it and it´s very easy to organise. If the weather allows it, I´ll try it out myself when September comes. What do you think of this idea? Have you organised any parties in the parc?