fuel altogether since they made more money off of vehicle maintenance, while others decided to convert their garages into convenience stores, noting that they met a need and in some cases netted more profits than garages. In 2011, there were approximately 47,195 gas stations with convenience stores that generated $326 billion in revenue. Of the 150,000 convenience stores in the country, 120,000 of them are located at fuel stations, which sell approximately 80 percent of the fuels purchased in the country. Policies regarding the sale of adult magazines vary, but generally larger chains (such as 7-Eleven and Casey's General Stores) do not sell these items, while smaller independent stores may do so. One notable exception is fast-growing regional chain Sheetz, which until the late 2010s sold some soft-core pornographic material such as Playboy, Penthouse, and Playgirl. Sheetz ended this practice as part of a broader decision to end sales of all print media. Because the laws regarding the sale of alcoholic beverages vary from state to state in the US, the availability of beer, wine, and liquor varies greatly. For example, while convenience stores in Alaska, Pennsylvania, and New Jersey cannot sell any kind of alcohol at all, stores in Nevada, New Mexico, and California may sell alcoholic beverages of any sort, while stores in Virginia, Idaho, or Oregon can sell beer and wine, but not liquor. Similar to grocery stores, convenience stores in New York can sell beer only, not wine or liquor. Altoona, Pennsylvania–based Sheetz tried to find a loophole in 2007 by classifying part of one of their prototype stores in Altoona as a restaurant, which would permit alcohol sales. State courts in Pennsylvania promptly overruled this. State law requires restaurants to have on-site consumption, but Sheetz did not do this. Sheetz continues to sell alcohol in other states. In recent years, Sheetz has begun to sell both beer (in the form of walk-in "beer caves") and wine in most of their Pennsylvania stores as well. Crime American convenience stores are often targets of armed robbery. In some areas of the US it is not unusual for clerks to work behind bulletproof glass windows, even during daylight hours. Some convenience stores may limit access inside at night, requiring customers to approach a walk-up window to make purchases. The main dangers are that almost all convenience stores only have one person working night shift; most of the transactions