Swimming in Chicago

Hello, I will be in Chicago from June 30 to July 6. I've looked in the 'Places to Swim' and it seems there's MANY places to swim in the area. Would anyone know of a masters team that would allow me to drop in say 2 or 3 times during that week? I swim with Sun Devil Masters in Tempe, AZ....and a week off would be a bit much, especially with our long course meet coming in late July. Also...if anyone knows of any swims in Lake Michigan, or other events that week, please share. There may be something for July 4th. Thanks for any ideas and suggestions. Tim Murphy tim@usms.org