Allegheny Wine Mixer is my go to spot in Lawrenceville for a nice drink and relaxing atmosphere. The drinks are always very good and they have a great wine selection. The food they have, although limited, is really good as well. I always get a sandwich when we go.
All of the people working are very nice and accommodating. My boyfriend and I usually hit this bar up as a last spot before ending the night, but it's also a really good spot for happy hour as well. Hope this is helpful!