Foam will starting building up in the bucket and start pouring all over the place. Eventually, the kiddie pool will fill up with water. Two people should be in charge of emptying the kiddie pool with buckets into a drain. You may need to have an assistant spread the foam out with a snow shovels. Also, since dancing rapidly destroys foam, you'll need to have someone making foam throughout the party.
Testing is also a good time to try out variations to the procedure outlined here.
If you find any improvements to the procedure, and especially if you find some other kind of soap that works well, let me know. The Party Lots of people are going to come to your party, because foam is a big novelty. It's probably a good idea to set up a changing area for your guests, so they can put on swimsuits or old clothes or whatever community standards dictate. It's also probably a good idea to provide towels for them when they exit. Make sure you have good music, and everything else you would normally have at a party.