I'm not sure I'd want to hear someone talk about anything for hours. This has become ever more evident to me as I navigate grad school. However, I wouldn't mind talking about for some time. Especially if it is a situation where I want to cultivate relationships and connections.
As for how it relates to ties, you seemed to use the cricket example as evidence of the type of thing you try to avoid by not wearing grenadine ties. It seemed a bit odd to me, but I ran with it. What I'm getting at is that your attempt to find mutually acceptable middle ground that all would find acceptable is counter-productive. Differences in taste or opinion are just as much an opportunity to form relationships as they are challenges.
It's funny because to me it is the other way round. I wouldn't mind talking about a new subject for hours, and meeting people with a totally different mindset, socially. Professionally, the small talk is only there as a mutual calibration before the important stuff is breached. I'll continue this using dieworkwear's answer.
It's kind of you to think that I get email from readers, but I don't get that many messages. Honestly don't categorize people's questions into experts or beginners either (not saying that to be polite).
It sounds like you don't want to wear grenadines because you don't want people to ask you about fashion? Because it's something that you're not interested in (and seemingly somewhat hate)? I guess if the topic comes up, you can just say you don't know much about it and be friendly.
Honestly, it seem more like you dislike a certain group -- I guess a fashion-conscious crowd -- and don't want to be associated with them. Which is fine. I think that's how a lot of clothing choices work. Maybe Singapore is full of guys walking around in Givenchy tees and grenadine ties, I don't know. I just can't imagine grenadines being a thing or not a thing since I think of them like rep stripes or wool ties.
Here's a specific example I was thinking about when typing that up (and seriously guys, you're taking it way too seriously).
Imagine there's an industry event of sorts, maybe evening drinks after a short talk. You have a couple hours to find new clients, or establish connections that will maximise mutual value add going forward. Realistically this means you'll have 4-5 good chats.
How do you pick which people to start a conversation with? You draw on previous experience and make quick decisions. If it's a tech event and you're looking to meet VCs or larger companies (future clients), you'll privilege the guys wearing a shirt and slacks over the jeans and T-shirt crowd. It doesn't mean you think slacks and a shirt imply that their wearer is superior to the jeans and T-shirt crowd. It means you're here to get clients or funding and it would be a waste of your time and the other guy's if you talked to him instead. You'll have to take my word for it that a grenadine tie is a subtler signal along those lines without being a criticism of a social group, tribe or "fashion-consciousness"; or at least that I believe it to be so sufficiently as to alter my behaviour. You'll also have to take my word for it that both sets of people dressed that way on purpose.
On that note, I'm out of the conversation. It's the second time you are implying negativity where it was not meant and "honestly" I am not comfortable with the process. There is no real defence to assertions of disliking a group, other than disengagement, as it is impossible to disprove.