From what I've seen, you often find your soul mate when you're not looking. When I met my husband, I was not looking for a husband or even a long-term relationship... but here we are, nearly ten years later.
You may want to think about introducing these two people to each other in a non-date setting. (I assume they don't already know each other, or don't know each other well.) Honestly, I'd be wary of a blind date (having been on several bad ones) and I'd be creeped out if some random guy I didn't know called me and asked me out for drinks (coffee, dinner, whatever).
The three of you could go out to dinner, or you could enlist a "co-conspirator" and the four of you go out. Make sure the two of them talk mostly to each other. Then, step back and see where things go. Drop hints if necessary - take your friend aside and say, "you know, he really likes you." They may get together, they may become friends, or nothing may develop.
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