Is it a first date and you're testing the chemistry? Maybe a little caffeine will get the juices flowing. Make sure you don't annoy the people who are actually studying chemistry. Take an outside seat and give'm a nice time. It's really not that expensive to buy them a coffee. Seriously, don't think about gender roles, just buy it for them. A little advice here, if you're caffeine sensitive, don't get caffeine. You're here for your date, not the bathroom. In case you do need a bathroom, you can visit this website.