When Steve Jobs first met Bill Gates, he looked at his attire and asked him;
"Hey buddy, do you need a buck for a coffee?"

This is grammatically incorrect :) Semicolons are used :

To help separate items in a list, when some of those items already contain commas... [or] To join two sentences.
http://writingcenter.unc.edu/handouts/semi-colons-colons-and-dashes/