Wädenswil, also known as Wädi, is one of the larger cities at lake Zurich. Brazilian Jiu Jitsu is relatively new here.
If you want to train BJJ in Wädi, check out BJJ Lab Wädenswil. The gym is located at the Budo-Schule Wädenswil, Oberdorfstrasse 27 in 8820 Wädenswil. There are classes for both adults and kids (and a big student discount!).