Went to a ballroom event once with a live band. The only rhythm they played was foxtrot - the whole evening.We had a live duo at one social advertised as practica and there was a pause for a clap at the end of every song. Tandas of two songs were the average with some couples opting to dance the entire live set (8 songs? then a DJ set then Second live set) together and some people not dancing during the live sets at all.
A codigo I'd come across with a live tango orchestra is to listen to the first set and dance the rest. Live tango orchestras are like hen's teeth, so never experienced that. Where there's been a tango group then they've just got on with tandas (not enough time for niceties). Have had a group of musicians from some prestige orchestra who did an 'Argentine Tango set' (not Piazzolla). Well played, but no feeling.
Without some publicity of 'codigos', they're not going to happen as they're unknown, and then they're going to need to be accepted. They also need some alignment - almost a standard rather than what one venue found they had to impose to keep order. Not seen any promotion of a 'standard' from any cultural institute in Argentina (but maybe need to search in Spanish), nor from any European country 'co-ordination' (for want of a better description).Conclusion...
Absolutely.It's always about the money in the end, however idealistic people get.