I think the key point is you have to be the one to make the effort, irrespective of whether it involves drinking or not. For instance, if you were into drinking, you could invite that individual round for drinks, rather than hoping about hearing of an opportunity from them. You create the opportunity. A lot of people get anxious leading with the first stride, but nothing ventured means nothing gained. People will be exactly the same as yourself, and generally, I find you have to throw out a bone (and quite a big one) to evoke a positive response and allow someone to open up to you. Granted, it doesn't always work, but as mentioned before:
nothing ventured, nothing gained. And in 90% of situations, I guarantee it works.