AAK - you don't know genius comedy writer is only in it for quick sex. Perhaps he just enjoyed your company, found you attractive, witty and fun to be around so he wants to be around you some more. Not far fetched as far as I can tell. And even if he is just looking for a roll in the hay it certainly doesn't mean you have to give it to him.
When I was out mingling I just assumed that the guys who were flirting with me wanted to get me into bed. So I didn't take any of them seriously and just enjoyed it for what it was. I was getting what I wanted (positive attention) and they got the opportunity to talk to me!
It's just casual dating, not looking for a life partner. I think if you go into it with the mindset that this is just another fun GAL activity and/or practicing a skill you haven't used in a while then it won't be such a big deal.
If you love somebody, set them free. http://tinyurl.com/2empx2g