I started dancing in Germany and there it was normal to dance two times in a row with the same partner, if you stopped dancing after only one song you were communicating that you were not enjoying the dance at all.
After traveling abroad I was a bit surprised to find out that in most countries only one song is the norm. Yet in some there is still the two (even three if you start dancing mid song similarly to Tango) dances tradition.
What do you consider to be the norm in your country? I'm just asking because I wouldn't like to be rude if I leave too early or overstay my welcome.