Re: How long to become proficient in tango
I agree roughly with everybody else: maybe 2 months/4 hours of lessons to being able to go to milongas, maybe 3-5 years to become an intermediate dancer (comfortable dancing at any milonga, with anybody), and then years and years of finding ones own style, own musicality, revisiting old things and so on.
Re: Friendliness of the tango community
Tricky question.
To some extent (which varies from community to community) tango is a relatively "private" affair, and getting dances is a skill set that few people consciously teach. There is a method to looking like one wants to dance. I often think that the proverbial "only pretty girls get dances" has more to do with the fact that they believe that they will get more dances, than anything else. Somebody who hides in the back of the room and looks only at the dancefloor will not get dances mainly because they don't look like they want to dance. Add to that that a lot of the more experienced people tend to gravitate towards using the cabeceo (or some sort of implicit pseudo cabeceo) and we get an environment that is potentially very opaque to new people or visitors.
Additionally the question for new people is not "why doesn't anybody want to dance with me", but "why doesn't anybody want to dance with me more than they want to dance with everybody else at the milonga" - a very different proposition - for me it looks like a decision for or against me, for them it looks like a choice between a dozen different options.
I personally would be quite surprised if i visited a milonga for the first time and anybody besides the host welcomed me - and tbh i am not a big fan of being introduced to people - our preferences in music and style might be completely incompatible, but we would still be forced to have at least one tanda.
So, what to do when going to a milonga for the first time:
1) find a spot where you can see/be seen (if there is assigned seating like in BA, either come early or get a reservation)
2) watch the dancefloor and the people
3) find somebody who looks like they are on roughly the same level of ability, and "fun" and start tracking them. If they never sit down find somebody else - your first tanda probably not going to be with the superstar of the milonga. If you are really good, look for somebody who is below your level, but still good enough to be enjoyable to dance with - again, your first tanda is not going to be with the superstar of the milonga.
4) followers: stare them down and look like you want to dance with them - you will feel like an idiot the first few times you do that, but it works. leaders: check if the milonga does cabecos - if so you do the same thing as the followers (the cabeceo is symmetrical - one of the nice things about it). Else: ask the follower to dance.
5) repeat a few times - usually after the third or so tanda the people who pay attention will have a good idea if they would have fun dancing with you, and everything will get easier.
Biggest pitfalls:
1) not understanding the milonga: if everybody meets at the snacks and chats, you have to go there, and chat. if everybody sits and cabeceos after the first song of a tanda is almost over, you have to do that. if everybody jumps up as soon as the cortina starts to grab a partner, do that. Sure, we are all think the way our home milonga does it is the best, but as a guest we have to accept that this is not our home milonga.
2) not understanding who will enjoy dancing with us: Always remember: we are way worse dancers than we think we are - if you doubt that grab a friend, and ask them to video you while dancing. You will be very surprised at how you actually look like dancing (well, i always am - i do videos every half year or so to identify things i could be working on, and my reaction is always "I look horrible - i have not fixed any of the things i wanted to fix, and instead there are new bad habits!")
3) Being grumpy. nobody wants to dance with somebody who is not having fun, especially when they are not part of the community. So, instead of "sitting and being angry about not dancing" is "sitting and drinking a beer" "sitting and enjoying watching great dancers" "sitting and enjoying great djing" "wandering around and having the wonderful snacks and complimenting the host on the venue"
4) being unlucky - every milonga has horrible days.
In my experience the tango community has quite a bit of surface tension, and it is quite easy to bounce off it - sometimes for random reason. But if you don't bounce off it is a really warm and welcoming community. Knowing somebody at least by sight, like classmates or advanced students from the same teacher, offering positive energy, being a great dancer, and just being persistent are good ways to reduce the surface tension.
Gssh