The so called (in English) "siesta", which in Spanish would be just "the lunch break", is a compulsory long break in many professions. Many would rather close shop at 5 or 6 than at 9pm, but everyone has to do it at once or it won't work.
The solution most would expect to succeed is a legal one: I know of a dev shop that could easily switch to a 9-5 schedule, as many banks and civil servants have already, but it has to keep a split timetable just because management wants it so.
I'm not accusing anyone of being an alcoholic, I just know what I would be doing if I had a mandatory 2-hour lunch every day! And it's not eating (probably not as much as I do now)
EDIT: On the chance that my ambiguous grammar has got you tied... in the right order, I would be a bit slow for an hour or two in the afternoon, after having three or six cervezas.
The solution most would expect to succeed is a legal one: I know of a dev shop that could easily switch to a 9-5 schedule, as many banks and civil servants have already, but it has to keep a split timetable just because management wants it so.