The box office underwent a religious conversion this weekend as Christian crowds flocked to "War Room," lifting the low-budget salute to prayer above the Zac Efron drama "We're You're Friends" and the Owen Wilson thriller "No Escape."

Filmed for a mere $3 million and distributed by Sony's Affirm division, "War Room" more than tripled its production budget in a single weekend, picking up $11 million. That also easily topped projections that had it debuting in the $4 million to $5 million range, although in retrospect those estimates were overly conservative given that advance ticket sales were unusually strong.

The film is the latest faith-based hit from director Alex Kendrick and his brother, writing and producing partner Stephen Kendrick, the pair behind "Fireproof" and "Courageous." It marks the biggest debut of their careers.

Despite the success of the "War Room," "Straight Outta Compton" topped charts for a third consecutive weekend, becoming the first film to manage that feat since "Jurassic World." The rap biopic about the early days of N.W.A. pulled in an impressive $13.2 million, pushing its domestic total to $134.1 million. It is now the highest-grossing musical biopic, trumping the Johnny Cash drama "Walk the Line" and its $119.5 million domestic haul.

"War Room" reaffirms the potency of faith-based crowds, ranking along previous hits such as "God's Not Dead" and "Heaven is for Real," but aside from its success, there was very little to celebrate.

The month of August sputtered to a close as the trio of new releases failed to inject much life into ticket sales. The overall box office was down more than 20 percent from the year-ago period when "Guardians of the Galaxy" was still drawing big crowds. That comparison is problematic, however, given that Labor Day fell during that period and the holiday has been pushed back a week this year.

"No Escape," a thriller about an American family ensnared in a violent political coup in a nameless Asian country, finished in fourth place with $8.2 million. It has earned $10.2 million since debuting on Wednesday. The Weinstein Company paid just under $5 million for rights to the film, which was criticized in by some critics for being retrograde in its depiction of a developing country's culture and politics.

Not even the presence of Efron could lift "We Are Your Friends" at the multiplexes. The look at the electronic music scene bombed, eking out a paltry $1.8 million from 2,333 theaters, making it the worst wide-release launch of the "High School Musical" star's career. The film fell far short of projections, which had it debuting to roughly $9 million. Warner Bros. spent $2 million to acquire it out of the American Film Market.

The top five was rounded out by "Mission: Impossible - Rogue Nation," which captured third place with $8.4 million, and "Sinister 2," which nabbed fifth position with a $4.7 million finish. The latest "Mission: Impossible" has earned $170.5 million since debuting in July, while the second "Sinister" film has racked up $18.5 million in two weeks.