I'm a Canadian citizen who will soon be starting work with a company with periodic business trips to a US office, most likely on a B-1 visa.

I regularly visit the US as a tourist, and the location of the US office is in an area I'd like to spend some time exploring. Assuming I wouldn't hit any bureaucratic hurdles at work over this kind of request, what arrangements should I make in order to stay in the US as a tourist for a short amount of time (1-2 weeks) as a tourist after the expiry of a similarly short B-1, if this is possible at all?

To be clear, I'm most interested in staying stateside immediately after a business trip for leisure/travel purposes, and explicitly not taking a flight back home before turning around again.