Carry And Go Briefcase Bbq Is It Ok To Carry A Briefcase/work Bag?

Is it ok to carry a briefcase/work bag? - carry and go briefcase bbq

Recently, I had this bag - http://www.johnlewis.com/58288/Style.asp ... but my work is very low, but I like to look smart, I thought now that everything is bigger to move all my days in bits (not necessarily related to work lol)

It would be out of place?
What can I do it despite my daily / keys / ID, etc.?

Thank you:]
xxxx