I almost always have brought a deck with me to metaphysical events and when I do attend them-----it has became a habit----you know just in case---
--here I Thought I was weird!!!!
---I just throw one in the purse I am taking that day or whatever before I go to the event.
But NOT a "particular deck"--
Like for example I used to go to this metaphysical store every Saturday back when I lived in the states because my Uncle hung out there for years and I was active in the Pittsburgh Pagan community when I did live in the states----
It was cool there, at the store (Indian Summer) it was called----people were able to hang out in the back of the store and drink coffee, chill as long as they wanted and talk about metaphysical type things with other people of like minds as well as open minds on new age topic(S)
...we would show off gems, and of course tarots came up often like reading cards for each other for fun----it was a real community atmosphere...I miss it
---but the deck does change depending on the mood I am in,--there is no ONE deck ----
it could be which deck I am currently using, or it could depend on the event I am going to, or maybe I just got one in the post that day and I am excited about it!
and yes I did bring The Robin Wood Tarot to the 'Spirit Farye' I attended last weekend....here in Isle of Skye Scotland---