The City of Chicago manages 49 seasonal, outdoor swimming pools, as well as the 28 (or so) indoor pools listed on this site; you can find out about them all on the City's Swimming Pools web page.
Not all the indoor pools are open at any given time and, of those that are open, not all have lap swimming sessions on their schedules. Before making arrangements that may be disappointing, check the pool's schedule on its official web page ("Website", above).
Not all the indoor pools are open at any given time and, of those that are open, not all have lap swimming sessions on their schedules. Before making arrangements that may be disappointing, check the pool's schedule on its official web page ("Website", above).