JAR,

While I usually don't absolutely NEED one, I always pack one and generally do bring it along in the evenings. As already suggested, sometimes, after a long day in the sun, the evening breezes can be a bit chilly and I find some places will crank the ac to a point the sweater is well appreciated. <img src="http://www.traveltalkonline.com/forums/images/graemlins/handshake.gif" alt="" /> <img src="http://www.traveltalkonline.com/forums/images/graemlins/handshake.gif" alt="" />