I attend the traditional Roman Catholic Mass of ages, sometimes known as the Old Mass, whenever the opportunity presents itself. Sometimes by invitation; sometimes because I am in proximity to where such a Mass is available.
I do not believe in reincarnation and therefore have not recognised someone from a past life.
I am not involved with any members of groups that might class themselves as "Ancient Western Wisdom Traditions." I have met and invariably still meet in the course of life those who subscribe to one or more such traditions. What you describe as "Ancient Western Wisdom Traditions" is a broad spectrum of spiritual tradition found in Western society. It could also refer to esoteric knowledge collectively pertaining to the Western world, eg alchemy, theosophy, tarot, astrology, Rosicrucianism and ceremonial magic. The Western Tradition has no one source or unifying text, nor does it hold any specific dogma, instead placing emphasis on Gnosis or inner knowledge. Hermetic organisations, neo-pagans and Thelema (the product of Aleister Crowley) persist in practicing modern variants of what is described as traditional Western esoteric philosophies. The Catholic Encyclopedia sums up its origins thus: "Its beginnings have long been a matter of controversy and are still largely a subject of research. The more these origins are studied, the farther they seem to recede in the past." (The Catholic Encyclopedia, Volume IV: Esotericism and Gnosticism)