Bnai Ruven doesn’t seat more than 100 with a dance floor. KINS gets crowded at more than 200 with a dance floor. Skokie Valley is a non Orthodox synagogue and many do not want to go there. White Eagle is a restaurant/club type place that has discouraged frum people from going there. (They’ve raised prices on the outside Kosher caterers that would need to come in to the point that it is no longer an option.)
Before the Concord/Midwest Conference Center opened, most people went to the Ramada or Sheraton at Ohare, and they were somewhat more competitive in those days. Ramada has changed ownership, it is now a Holiday Inn Express, and does not have an arrangement with any kosher caterers. Sheraton changed its name a few times, (Clarion, Wyndham) but closed down on 12/31/09 due to the recession.