My coworker DMed me on instagram and the convo led to him saying I should let him know some time when I go out. Our workplace is big so I can go weeks without seeing him in the building. I said I'm always up for happy hour if he wants to go some time this week or next week. He agreed and we made plans for the upcoming weekend. We met at a bar and he paid. Then went to another bar where he paid again. He drove me home (bars were walking distance from my house), and I offered for him to drink some more on my rooftop. He said he definitely would, but had to wake up early the next day. I said no worries, and as I was getting out the car, he kind of patted/touched my thigh. I texted him the next day saying how much fun I had and he agreed. I said if he's up for it we should do it again and he said yeah that should be fun.