Yes it is!
ymca
You should check your local swimming pool. Or you can see a YMCA.
I would say swimming.
Yes the swimming pool a very popular place
Yes, the YMCA's are open their regular hours on Presidents' Day.
YMCA's offer swimming lessons year round for children and adults. The schedules vary from one location to another and you would have to inquire with your specific Y to find out their particular schedule.
Public pools have hours of operation, and there are none that I'm aware of that have hours that late. Which would make it trespassing and perhaps even breaking and entering.
It is the Chlorine
The opening time of YMCA varies by location, so I recommend checking the YMCA's website or contacting your local branch for their specific hours of operation.
The Wheaton Family advanced a large sum of money to help with the construction of this fantastic public facility.
Yes, but non-members have to pay more money than members.