Most states allow clergy or other religious leaders to decide whether to allow firearms in a house of worship. Except ...

... Kansas, Louisiana, Michigan, Mississippi, Missouri, Nebraska, North Dakota, South Carolina, Texas, Utah, Virginia and Wyoming all ban concealed carry in churches, temples, mosques and other houses of worship.

Some states, including Nevada, allow guns where gambling occurs. Casinos in that state, however, can prohibit guns and arrest people for trespassing if they do not comply with the rule. 

Six states, including Pennsylvania and Oklahoma, do not allow guns where gambling occurs.

In most states, including California and Pennsylvania, guns are allowed in bars and restaurants, as long as they're in compliance with the law.

Sixteen states, including Florida and Louisiana, prohibit guns in places that serve alcohol.

Most states, including New Mexico and Colorado, allow guns in baggage claim and arrival and departure areas of airports as long as the person is adhering to state carry laws. 

But guns are not allowed on planes. "You may transport unloaded firearms in a locked hard-sided container as checked baggage only," according to the TSA.

In most states, you can bring a gun to vote and even carry it openly, depending on state law.

Ten states, including Arizona and Arkansas, ban guns at polling places.

It's also worth noting that federal law bans guns in K-12 schools, where many polling places are located. 

The large majority of U.S. states allow guns in hospitals and medical facilities. 

Five states, including Nebraska and Texas, ban firearms in hospitals; four additional states prohibit guns specifically in mental health facilities, which includes many hospitals that also provide such care.

Congress approved a law in 2010 that allows loaded, concealed guns in national parks across the country. 

In states that allow open carry, people can openly carry legal handguns, rifles, shotguns and other firearms into state parks. They may carry concealed guns if allowed by state law.

For example, you can bring a firearm into Zion National Park, as long as you can legally possess one under Utah, federal and local law. 

Guns are allowed by law in stores and malls, though any privately owned facility can prohibit them. 

In 2014, Target asked people not to carry guns in their stores, but specified that it wasn't a policy change, just a request. 

A number of other large retailers, supermarkets, and fast food chains have similar policies.

Most states, including Texas, allow guns at public sporting events. 

Many stadiums, like Memorial Stadium in Indiana, prohibit guns. Only six states, including Kansas and Oklahoma, prohibit guns at games and meets.

Some states, such as Ohio, allow companies to ban workers from bringing guns. That said, in many states, concealed carry laws do not explicitly ban people from bringing guns to a workplace (unless they work at a place where guns are banned). 

In Alabama and Florida, employers can't stop people from keeping guns locked in their cars on the company's property. 

At least 30 states, including Texas and Michigan, do not allow public libraries to impose gun policies.

But some states allow public libraries to prohibit guns. 

Guns are allowed in theaters in every state as long as relevant carry laws are observed. 

However, at least two large chains - AMC and Regal - prohibit firearms on their premises and may legally ask gun carriers to leave the premises.

Ten states, including Texas and Colorado, allow guns on college campuses. 

Twenty states and Washington, D.C., do not allow guns on college campuses. In the rest of the states, it's up to the schools to decide. 

Concealed guns are legally allowed in hotels, but many hotels have policies prohibiting them. Hilton is one such chain.

And of course, gun shows are often held in hotels.