Not recommended. I'm not sure if they'll kick you out since they don't publish a dress code, but you might feel uncomfortable as it is a semi-formal atmosphere for dinner, less so at lunch on weekends. This time of year (March), you might be cold.
Thank you, Marge. I only asked based on how in Mrs. Doubtfire they were all dressed to the 9s.
Thanks! Your answer is awaiting moderation.