The real meaning of Satsang is 'association with the Wise', preferably the Self-realised Sages (Jnani's) who speak only of God and fully practice dharma (righteousness), though Sages who are not yet Self-realised, but live according to the rules of dharma are also considered to be Wise. Association with the wise is said to be the root-cause of all that is good.
Jnani's are dharma personified, they NEVER stray from it, even for a split second. They are identical with God and nothing is beyond them. They know the world to be an illusion and have little or no interest in it. They do not seek to accumulate wealth or property, they are not interested in fame or acquiring followers. They do not advertise nor entice others to advertise for them - God does not need to advertise, He is the soul of everything.
Just before Bhagavan left the body, Chadwick and others approached Him and asked Him how they could repay Him, should they write books, tell the world about Him, etc. He replied "Put my teachings into practice".
Today the word 'satsang' is widely used to promote what can only be described as talking-shops (the opposite of satsang), where self-appointed gurus pontificate about subjects they know little or nothing about, manufacture their own poisoned theories, indulge in cheap psychology and pursue their vices. They also expect you to pay for all of this in every possible way.
It is also widely used for meditation sessions, but this is not true satsang by any stretch of the imagination.
The primary requisite for those seeking self-realisation is the ability to discriminate between that which is useful and that which is useless/harmful in the search. Becoming attached to the wrong person or group can do immeasurable harm, not only in life in general, but can also disturb and even destroy budding faith; it is therefore imperative that caution is exercised in every possible way.
You must carefully weigh up everything that you see and hear. Clear teachings are available from the publications of Sri Ramanasramam and ancient scriptures such as - Tripura Rahasya, The Srimad Bhagavata, Advaita Bodha Deepika, Yoga Vasistha Sara, The Bhagavad Gita, Ribhu Gita, etc. If what you hear is contrary in any way to the essence of these works, then do not return.
People were attracted to Bhagavan Sri Ramana Maharshi by his purity and simplicity. Measure anyone who promotes themselves as a guru by the conduct of Bhagavan and you will not go wrong. But also bear in mind that it is fairly easy to fake the outer appearance of a jnani, but it is impossible to fake the ananda (peace) or power that was experienced in his presence.
In the late 1990's I saw a website that listed all of the 'known' Jnani's and their so-called 'lineage'. It started with Ramana Maharshi who apparently transferred Self-realisation to H.W.L. Poonja, who in turn (if I remember correctly) tranferred it to 300+ others with lots more to follow. We all fell on the floor with laughter upon reading this ..... what is there to transfer and from whom to whom? If it can be transferred then it was not there in the first place, is not permanent and not worth the effort.
Unfortunately they have not gone away, Tiruvannamalai is plastered with posters advertising these people during the winter months.
God, Guru and Self are one and the same. True satsang is therefore association with the Self and that does not require anyone else.