Okay, so now I look like a fool… But all I’m allowed to say that will hopefully go through is that just as one may learn after Chatzos on Nittel night regardless of how Chasidish one is…. so no mikvah I know of is closed for Nittel as there’s a simple solution.
And since I don’t live everywhere or know everything those with concrete information to the contrary can chime in. That includes Sam2, who’s admittedly very reasonable and his posts are usually well thought out. I did not mean to hurt him, just felt this issue needs clarification.