Tuang’s Taphouse is surrounded by kitchens who provide food for galactic Plebians in the food court on one side and the patrons of Tuang's Taphouse on the other. The desired ambiance dictates whether the bar is above (balcony bar - nice for the flying species), below (basement bar - nice for wet species) or behind (mall bar - just sad) the food-court kitchens.
When entering Tuang's, a micro-scale sample of the patron (a few dead skin cells, for example) informs a digital device which menu to show as well as eliminating all of the food items that their DNA (or whatever passes) indicates intolerance for. Of course, the Ryzineans find that disgusting, so they just send a small electrical pulse to an internal bypass that triggers their menu. Conversely, the Blearinos love expelling their mucus on the device, so Tuang designed them for frequent sanitation and acidic environments down to pH 1.2. After the device determines the species of the patron, an "interactions board" gets updated.
When a patron orders, two things happen. First, the interaction boards get updated. Second, orders go directly to the kitchen(s) of choice and proceed according to the cultural expectations of delivery - Xanshians only eat what they catch and four other species refuse to consume anything touched by non-worlders. The D'hColi have religious reasons and it's widely suspected that the Utuairops are just racists, but the others have well documented cases of allergic reaction. A fifth species, the Ryzineans, have such complicated ceremonies around their food service that Tuang's food runners almost never bother, though now-Ambassador Glinea used those ceremonies to launch her diplomatic career.
When a Xanshian orders, new patrons get alerted that when the house-lights turn off and a green spotlight shines on them, they must not leave the spotlight until the house lights turn back on. That frequency of green was chosen as it is the only one reliably visible to all of the patrons. It should go without saying that the doors lock when the spotlights are on.
31 fluid (gas, liquid and intermediate) menu items have documented or suspected reactions, so there are no cups at Tuang's. Woe to any who spills beer on a Xanshian, because they only have 28 seconds to prevent murder if they know how. Single-serve micro-kegs provide beer and other pressurized items. Fluids at atmospheric pressure arrive in the equivalent of sippy-cups.
Lastly, Tuang's employs a part-time xenobiologist to test every food item on every menu against the biology of every species that dines there. The xenobiologist has prepared anti-histamines, anti-toxins, contingency plans and instructions for every expected interaction. As well, they programmed the interaction board to update staff on current dangers and how to fix them. Back when the D'hColi and Utuairops arrived it was extremely lucrative, but these days, they only work when new food and beverage items get introduced.