Isn’t that better than chatting with your friend and being interrupted only to turn the guy down because you’re not finished talking?
IMO, no. If I genuinely want to dance with the guy, just not at that moment, I make that abundantly clear--facial expression, holding his hand or placing a hand on his arm or some other form of physical contact, promising to find him for the next tanda/making him promise to find me for the next one. Or, I say excuse me to whoever I was talking with, enjoy the tanda, and come back to it. It depends on the conversation and whoever's asking.
The thing about being rejected is a two way street, first He gets rejected by woman # 1 #2 and #3 and you’re #4. This guy is going down the line till someone says yes.
Yeah. So? If I want to dance, I'll dance. Who cares what others before me have said to his invitation. Generally, if the poor guy has been turned down repeatedly and I've noticed, I'm more likely to say yes...assuming he's not one of the few guys on my Do Not Dance With list.
There’s a old saying about everything being seen at the milonga.
Maybe so. People need lives. I'd rather watch the dancing, or be dancing, or chat with someone than engage in the nonverbal equivalent of gossip. What a colossal waste of time and energy. I've been through middle school, and I have no desire to repeat the experience. If others want to, that's up to them, but I'm not getting involved with that crap.
Now Peaches haven’t you ever avoided eye contact with that guy you hate dancing with? Cabaceo!!!!!
Yes, I have. And IME, the guys I really don't want to dance with don't get it anyway. I don't mean the guys who are just so-so, where if I had my druthers I'd dance with someone else. I will dance with those guys, because it's friendly and it beats sitting and they're not bad or injurious...just not my favorites. But the guys I explicitly do not want to dance with (there are a few) are oblivious. No amount of lack of eye contact, no amount of suddenly engrossed conversation, no amount of eating will deter them. That's when it comes down to an outright refusal. It's very rare for me, but I'll do it. So, again, IME there's no value-added.
Now...despite my objections to the cabeceo, I do use it from time to time. Usually it's with someone I know and have something of a standing invitation from, where it's just a matter of the two of us being free at the same time. Then...sure. Or the case when someone is walking towards me obviously to ask, and the question is asked and answered before they arrive. I do use it. I do get it. I just don't like it.
Edit to add:
I see them talking all the time and eating but always being watchful at the same time for an invitation to dance.
Well, another part of the equation I'm sure is that I'm pretty socially inept. (Shocking, I know.) Social interaction of one sort or another is difficult enough for me; trying to combine two or more (god forbid we get into the territory of chatting, eating, and glancing around for an invitation) just isn't gonna work for me.