I've done 2 stints, each lasted a fortnight but I only got into one case at each stint. At the first one I got "elected" as Foreman "because I was the only one wearing a suit". That was a ridiculous case because there were lots of occasions when the jury had to leave the court while legal matters were discussed - we spent most of our time trekking between the Court and the Jury Room. I actually enjoyed the experience of Foreman in that I got to talk directly to the judge because after I announced our verdict to the Clerk of the Court the Judge intervened and asked me if everyone understood the meaning of the verdict. We never found out what the complication was which led to the frequent exits but we speculated that the guy was stopped with stolen goods in his car to which he pleaded guilty but a further offence discovered at the time was what we were trying him for. We guessed that the court didn't want us to know of the theft as the defence barrister would use it to destroy the case, so each time a question to the guy or other witnesses was likely to reveal the theft the defence barrister leapt in to prevent an answer and we had to trek off while they discussed it. The rest of both fortnights was spent in the Jury Waiting Area twiddling our thumbs, reading years old magazines, or watching daytime TV.
Incidentally it is illegal to talk about the case outside the court/jury room so I've just broken the law.