In some countries of Latin America and the Caribbean, such as Mexico, Guatemala, Dominican Republic and others, quot; take is some cold quot; means taking some beers. Not I am sure of the meaning in other cases different.
a cold is incorrectly written and should be written as "a cold ( with tilde )" being its meaning: Cold is the name given to the beer in the colloquial language. In the case of the expression which we are concerned today ( a cold ) want to say " a few beers ".