Different pools have different times and rates. One pool has the last half hour of the days schedule for only one dollar. We take along our shampoo and soap and have our shower and shampoo courtesy of the pool. What we save on our hot water bill pays for our use of the pool. We also get our relaxation in and some companionship.
Some people come at the last fifteen to twenty minutes and get in free.
Besides the library, try gathering up all your old books and take them to a used book strore that will give you credit for both hard cover and soft cover books. We have a place that does this. I got the Harry Potter Books the same way. When the 4th Harry Potter book came out and people were lined up for hours. I waited until the afternoon and went in and asked if they had any damaged Harry Potter books at Barnes and Noble.