I found these links through Google, Genuine. Sounds like that place isn't well ventiliated enough. I'm not sure I'd stick around for further exposure, but I didn't find anything that said much about hazards from repeated exposure--just that it's a powerful pulmonary irritant.
The Facts About Chlorine
ATSDR - MMG: Chlorine

I know there are a good many studies that say chlorine-treated drinking water raises our chances of certain types of cancer, and if it's a potential carcinogen when ingested, it makes sense to me that it might be when inhaled, too--at least over the long-term.
What you dont know about chlorine could hurt you
birdgirl73 Reviewed by birdgirl73 on . Bad coughing not from smoking.. I work as a lifeguard currently and I'm in a pool 8 hours a day. By the end of the shift I can't control my coughing, its from the Chlorine in the pool definitly because all of the guests/lifeguards all have this bad cough. The place is an entire indoor water-park so the chlorine has really no where to go and considering all water attractions and the amount of chlorine they use its not a wonder why for the terrible feeling in the lungs. I've been working there for 3 months and I have Rating: 5