<human>: Can you give me a shortened version of the text?

My coworker and I don't work closely but he emailed me today after our shift ended asking if I would like to go get coffee with him. I'm not romantically interested in him and I want to say no if he means as a date but I'm not sure if I'm just taking the email too seriously and maybe he just wants to go get coffee as friends?

The email:

*Subject: Coffee (or perhaps tea)?*

*Hey,*

*I am aware this is kinda lame coming over email, but because its hard to chat at work, I figured why not. Judging from our previous conversations you seemed like a pretty cool person. We should get coffee sometime.*

I think we may have talked 3 or 4 times before but it was mostly small talk. I also don't know how he got my email address - I had initally thought it was one of those spam emails from a fake dating site. I'm also afraid of my work environment getting awkward by saying no.
<bot>: Coworker emailed me about getting coffee together but I don't know if he means as a date or to just hang out.