No, that is not entrapment, any more than it is entrapment for the highway patrol or state troopers to station their cars near areas where people are known to speed.Entrapment is when the actual criminal act would not have been done except for the police "commissioning" or causing the crime...for example, a police officer going to a teenager and saying, "Hey, kid, c'mon, buy some drugs...I got some good stuff here, cheap," would likely be entrapment, since the police officer himself initiated the crime. But simply waiting where you feel intoxicated people are likely to walk, without being the one serving them alcohal or encouraging them to drink, is not entrapment--it's just good, common sense policing.