It has started. From now until Sunday it’s not allowed to sell alcohol here in Peru. Also parties seem to be generally forbidden until Sunday. So it’s even more drastic than I thought before.
Update: I learned a few more things about this. The law is called “ley seca” (the “dry law”) and under this law selling and consuming alcohol is forbidden from Friday until Monday lunchtime on the election weekend. The reason is that drunkards actually go voting. Also large congregations are forbidden, with a few exceptions such as church services which are allowed on Saturday but not un Sunday.