I've noticed that many users, especially Indian ones, use the chatrooms as a place to socialize (nothing related to the site/topic, just IMing), as well as to garner votes.
Many of the users in these rooms aren't even active on SO/SE, they just chat
Also, these rooms are usually in Romanized Hindi (or another Indic language), so the mods just leave them alone.
A few weeks back, I'd taken up the task of keeping an eye on these Indian chat rooms. We had deleted https://chat.stackexchange.com/rooms/3688/cooking-tips, and I had found some others:
(and more, but I don't have a list of those)
But I was able to find a bit of technical discussion in each, so I didn't escalate the issue.
Most of the banter in these rooms comprises of small talk, jokes, and flirting. There's a bit of technical discussion, though I dunno if it's enough to allow their existence by Jeff's rules--I feel that they just ought to be deleted..
Update: It's been deleted, along with the others.
If you find any more such rooms, please let me know in chat or in the comments here. I already have a list of these rooms, which I shall go through one by one and request deletion if necessary.