As you use music as an example of another interest, I can use an example from that field for tea. Tea has a "payola" problem. There are a few different places online where you can talk about tea, but you will find certain teas, vendors, etc. are given preference depending on the mods of that place. One advantage of this forum is that even though there are vendors, the mods seem to understand how to keep appropriate separation. (Kudos to them for that, by the way -- it can't be easy.) So the vendors are clearly identified as vendors, and don't get special privileges. This gets rid of a lot of problems that other tea forums have related to guerilla marketing and "regulatory capture" (a term that seems a little silly being used on something like a tea forum, but I don't know if there is a better casual term for this).
If you keep all this in mind and still want to go adventuring, there are a few other active online tea-spots.
Instagram has its own tea-culture, although I am not too familiar with it.
Reddit has /r/tea which has a lot of disguised ads and mods that actively shape the conversation to head in certain directions, but also a lot of folks who just like tea and want to talk about it.
TeaChat isn't dead yet, although since a lot of the folks here came here due to dissatisfaction over how they were running things over there, this might not be a good choice.
There is also the world of Facebook tea groups, although some folks are uneasy about the lack of pseudonymity (even for a relatively harmless topic like tea) and they have the same moderator and vendor issues mentioned.
A fun one if you are willing to get weird is LinkedIn groups, as these seem to be populated almost entirely by Indian tea planters.
