Aside from the Casino Queen in East St. Louis, Hollywood Casino St. Louis in Maryland Heights saw the biggest revenue drop month-over-month in the St. Louis market. 

According to the St. Louis Business Journal, Hollywood Casino saw revenue drop last month by 6 percent, to $19.4 million compared with January 2012.

The drop is part of an overall trend in the St. Louis casino industry, where nearly every area casino saw revenue dips in January. 

Overall, according to the Business Journal report, revenue at the six St. Louis-area casinos totaled $83 million in January, down 4 percent from the same month last year.

In November, Hollywood Casino saw a 16.2 percent drop in revenue in November 2012 when compared to the same month in 2011, when Harrah's still owned the casino. That figure was by far the worst among St. Louis-area casinos at the time.

In May 2012, Harrah's was sold to Penn National Gaming, Inc. for $610 million.

That deal closed in November 2012 and the Maryland Heights casino into Hollywood Casino.  

Penn National owns other casino locations that include the Argosy Alton casino, Hollywood Casinos in Joliet, IL; Baton Rouge, LA; and The M Resort Spa Casino in Las Vegas.

Penn National has said it plans on pumping $61 million into the rebranding over the next six to nine months, which will include new slot machines and themes, and a new Boogie Nights nightclub in the previous Voodoo Lounge space.

Meanwhile, across the river, Ameristar Casino in St. Charles—which is slated to be bought by Pinnacle Entertainment—reported January revenue of $20.8 million, down 3 percent from the same month a year earlier, the Business Journal reports.

Historically, Harrah's played second fiddle to St. Charles' Ameristar Casino, although it remains a major player in the St. Louis-casino scene.

In January, Hollywood took in $19.4 million, just behind Ameristar for the area's lead.