I told my roommate that I had heard beer was great for getting rid of slugs. It took a few months to convince her, but eventually she agreed to give it a go. There was only one problem; she waited until we were at a gas station in my hometown to decide it was the opportune time to buy beer. The gas station my family frequents; the gas station we've used as gathering spot for road trips.
She tried to play it cool but her red face gave us away (that and when she asked the guy for a brown paper sack she told him it was for slugs). We killed about fifty of those suckers in one night.
It took a few more years of convincing, but today my mom bought beer for her slugs. If only they didn't have to do a price check at the grocery store.