Well, if you don't dance at all over the evening you are probably going to get no/a worse table the next time you go to that milonga.
Good seats at a milonga are always at a premium. The more skilled/experienced dancers and/or the hardcore regulars will usually get the prime spots. There is a hierarchy of sorts. Fortunately though, everyone pays the same to get in (or at least no one gets charged more than the standard - some people will always get in free because...) Whereas, in other situations e.g. sports, the best seats will go to whoever pays the most, regardless of whether they have any genuine interest in the event.