Aaron Chaim – There are no places, Chassidish or not, that do melocho after the shkiah. I don’t know where you get this that there are chasidish places that are mekabel shabbos after the first shkiah (I assume you are referring to doing melachah, not davening Kabbolas Shabbos).
This has been the case since at least World War I. Even before WWII, there were virtually no kehillos left that were meikil like Rabeinu Tam in regards to Kabbolas Shabbos.
(There are exceptions in the case of a a baby born bein hashmoshos Erev Shabbos, depending on which Chassidus, whether a bris is made the following Shabbos or not).