I was at Tivoli Bay many many years ago, there were beautiful old ice boats skating on it as well. Just to be sure we're thinking of the same spot, I'm talking about the area of the Hudson River cut off from the rest of the river by the railroad.
I'm mainly looking for easy to access ice skating to take the kids for a couple of hours so they can practice for going to the Winterlude Festival in Ottawa in February. Nothing too adventurous, no long approaches. At Winterlude, the canals through the city are frozen, groomed by Zambonis - you can skate through the city, incredible ice sculpture contests on the frozen lake, giant snow mountain playgrounds in Hull - haven't been there since pre-kids.
If you can't be a good example, then you'll have to be a horrible warning.