Any proprietor, keeper or manager of a saloon or resort where spirituous, malt or fermented liquors or wines are sold, who shall, knowingly, allow or permit any person under the age of 21 years to remain therein shall be punished by a fine of not more than $500. Nothing in this section shall apply to:
1. Establishments wherein spirituous, malt or fermented liquors or wines are served only in conjunction with regular meals and where dining tables or booths are provided separate from the bar; or
2. Any grocery store or drugstore where spirituous, malt or fermented liquors or wines are not sold by the drink for consumption on the premises.