I've never encountered the term before, but I think it means no hard liquor - just beer, wine and soft drinks.

Hosted Full Bar Package
Includes unlimited consumption of Club brand liquor as well as Imported and Domestic Beer, House Wines and non-alcoholic beverages.
For call brand liquors add $3.00 per person; for premium brand liquors add $4.00 per person.
wTo Hours Three Hours Four Hours Five Hours
$15.50 $19.00 $21.50 $24.50
Hosted Soft Bar Package
Includes unlimited consumption of House Wines, Premium and Domestic Beer and non-alcoholic beverages.
wTo Hours Three Hours Four Hours Five Hours
$12.00 $15.00 $17.00 $19.00
Bar Packages include pouring of House Brand Wines and House Brand Champagne for the Toast.
Wine List available for upgrade of wine. No shots will be poured.
For Premium Brand Liquors on the Hosted Full Bar Budget, $4.00 additional per person.
After Dinner Cordial Cart Available, inquire for pricing.

http://www.clubcorp.com/siteadmin/documents/nondb/pdf/101_pd...