Its interesting to read others suggestions, I find myself in the same situation all the time. I usually try to hold something in my hands so it would be awkward to have to shake hands. But theres always one client who tries to kiss me…I cringe and politely tell him to back away!! I find it very difficult sometimes being a woman in the secular work force and keeping shomer negiah and yichud to the letter of the law.
I work for an accounting firm and meet with clients, bankers, sales people on a regular basis, some are aware that I am a religious girl, but most dont realize or dont care, its definitely a struggle for me.