I went to Senor Wong during their late-night happy hour (around 11pm), so I can only base my review on that menu and not their normal dining menu. While the happy hour menu was pretty large (maybe 20 items), virtually none were vegan. Even the items that are normally always vegan at other restaurants, were somehow made with animal products at Senor Wongs, as though they were trying to slight the vegans.
For instance, their edamame somehow involves chicken broth. Seriously? Who does that? The waitress didn't seem totally sure about what the cooking process was, but it seemed like the edamame is steamed or boiled in chicken broth. The tostones (fried plantains) also couldn't just be fried in oil, they had to be fried in pork fat. Lame.
My friend and I ordered the El Mocko (faux duck) tacos, which was pretty much the only vegan thing on the menu, aside from maybe a side of fries. The tacos were outstanding and made a great appetizer, but would get pretty pricey if you tried to make a meal out of them ($3.50 each and they're pretty small).
The late-night atmosphere was pretty cool and I enjoyed the music but I think it was way too loud. Perhaps I only think that because I'm not really a club-type of gal, but I find it annoying when I have to shout across a small table to my dining partner. The service was friendly and one of the two waitresses serving us knew about vegan options, but they didn't really have much to work with.