Tir'ay was a chance waiting to happen. When the RP registration first started, Madea noticed that a majority of the characters had included martial arts and/or weaponless combat skill in their descriptions and suggested we declare it part of old city culture to general cheering. Every other idea that has been suggested only had minority support and soon got shot down by a chorus of boos.
I think we got pretty lucky with the Tir'ay thing being so popular from the start. The closest thing we've had to it is vague agreement that the architecture of Ther'avare should be a loose mix of Persian and Hindu, but even that gets rehashed in debate every time it's brought up.
VS isn't a generally accepted thing and probably never will be nor is the religious order it is derived from. Things like them will also remain marginal. Cultural concepts like those require a lot of time and effort to create and are very controversial, NOT a winning combination.
Tir'ay only required thinking up a name and a listing of obvious basic categories, all worked out and posted in their own thread within two or three weeks of the idea being presented in the discussion thread (P2P only had one forum at that time). After that it was left to the whims of the players to invent a kaleidoscope of 'schools' (nearly one for every player claiming Tir'ay skill) each with its own unique (and very sketchily defined) description. That preserved the general acceptance of Tir'ay among the members but assured that a well defined and truly unique martial art form will never arise. At this point I doubt that most of the warriors (let alone the other members) have ever bothered to read Madea's posts defining just what Tir'ay is (which is a shame since Madea put a hell of a lot of work into it to get the concept up and running).
It poses a serious problem to coming up with traditions or definitive cultural activities. A completely isolated city of 20,000 derived from the refugees from a single surface nation is going to have only a very limited range of traditions and a mostly homogenized culture. There just isn't the population available to support a lot of diversity. While the Tei'kaliath should have traditions and culture that is quite different from that of Chel'el'Sussoloth, the differences between individual Tei'kaliath should be much LESS than between the citizens of Chel who live in a city 5 to 10 times bigger and dirived from more than NINE different surface nations.
However, the MEMBERS are from several different countries with cultures so different that their native languages are different
and are from a base population 67,000 times bigger than Chel's.
Trying to get the members to agree on any tradition or cultural practice is a fool's errand. No matter WHAT is proposed the majority will oppose it because they either dislike it on principle or because they are convinced their own idea is better (even if they have no intention of ever putting in the time to work that idea out).
This doesn't take into account that the base of any culture concept that is proposed has to be the world setting which is in many ways radically different from any human culture (something which a majority of the members can't even follow with their character descriptions even after Madea beats them over the head with a stick