HI I went to a conference/ workshop and there were a lot of speakers. Do you think it would be OK for me to contact a speaker that was at a conference. Thanks

More info please? Was the email address given out? In what manner to you wish to contact him/her? Business? Personal?

Often speakers are there to promote themselves and their business. One email can't hurt. Did they leave contact information with the conference's website or literature?

Hi thank you will like to contact for business no they didn't leave email.

Maybe go through the conference/workshop organizers and ask them if it's OK.

Of course, if they are fairly well know, a Google search of their name and/or company may supply contact info