Actually, at Lubavitch you almost never need to make reservations for Shabbos, and even on Pesach you won’t get thrown out if you just come on in.
As for the street sign, those are the lunatic fringe. I have a feeling, knowing those characters as I do, that the sign is unofficial but that no one dares take it down. The city council has a Chabad presence, as Chabad took over a lot of former slum property and turned the former no-go zone called “Shikun Canaan” into a mokom Torah. The street was probably named that when the Rebbe was with us (or just named Harabbi meLubavitch even afterward as we have streets called Haadmour me (insert) for Rebbes who have left us). The loonies probably made and installed their own sign; I’d have to see a picture to know for sure.
These yellow flag goons are like the Petzuei haNachal of Breslov or the NK – a bunch of ex-cons and druggies with a ShaBaK agent or 2 thrown in to egg them on (the ShaBaK shtinker in Tzfas is Meir Baranes, who ran over and shortened the life of the very mainstream Chabad chief rabbi of Tzfas Rav Bistritzky AH and served only a few months in a mental institution. When released, he organized a pulsa denura in the Tzfas beis hachaim, which is a mokom koidesh, for Pope John Paul II who was mechasidei umois haoilam. He is clearly a protected species, and you don’t want to risk being the next one he runs over.)