Thanks for the encouragement. Because I posted this on another forum and people are calling me obsessed and desperate.
The only reason I feel the need to do this is what I said in the OP and that I'm on the clock during the event tomorrow (I'm tabling for an org) so I literally can't leave until the end. If he shows up at 11, leaves at 12, but I gotta stay there till 6, it's a bust.
So, yeah. This is what I'm going to say. "Hey, are you coming out to our art event tomorrow? I'm going to be busy most of the day, but afterward I'm going to chill and check out this restaurant I heard is good. You interested in joining?" And totally leave the ball in his court then.