It is actually ok to swim at shock level, just wear old suits.

Why do you need to shock? It is only necessary to shock if your chlorine drops too low for your CYA level (per the Best Guess chart in my signature below) or if you have a CC reading greater than 0.5ppm or if your water is cloudy. It is not necessary to shock weekly or on any kind of schedule. Some summers I never shock my pool at all.