Sorry wrong journal!
For sure! They'd have after school/weekend programs and over spring/summer break they'd run camps of sorts. Some of which would be like a few hour day camp which could be water focused, some are full day that would have some water activities included and some are sleep away camps where there would be water sports included as well.
I realize for obvious reasons volunteering for the latter two programs wouldn't really be feasible for a working adult but somebody donating time to an after school/weekend program or a few hour a day camp during the summer is more likely.