write or wrong:
Actually Crossroads is in Yerushalayim. I used to go there back when they were just starting off. It’s right across from Kikar Tzion, which is likely around the area your son is spending his time, if you live near Yerushalayim.
From the look of their website, they’ve expanded quite a lot since I was there. It also looks like it is run by more frum people. I can’t really offer my experience of it, since it’s changed so much since then.
Depending on what your son is doing now though, there might be reason to worry that it will help your son network with more of the wrong (or worse) people though.