There was a weekend-long Swedish dance party in Texas, if you knew the right places to be. Peter Bjorn and John hit up the House of Blues in Dallas on Saturday, playing a killer show to a less-than-enthused crowd, followed by a dirty, sweaty, awesomely fun set at La Zona Rosa in Austin. The crowd seemed much less self-conscious and much more ready to boogie down and have fun Sunday night, and the band’s energy level somehow managed to increase, feeding off of the group vibe.