In Beijing, a lot is possible and going on. You simply have to know. You want to eat Kosher? Uzbekistan? South-African? Belgian? No problem. Anything.
For the nightlife, a LOT goes on, some of it being for the well-informed insiders (and unprintable here).
I have the privilege to live on the “Gongti Strip”, aka as Gongti Xi Lu (Worker’s Stadium West Road). Quiet till 10 pm till all the Ferrari, Lamborghini etc. arrive, the girls with mini-miniskirts, boys smoking and being extra noisy, all on their mobiles and nobody giving a damn about where to walk, park, whatever. Often pretty chaotic as a result. The street, as well as the north door of the Stadium, are full with discos, bars, restaurants. KTV. Even Spas.

The map of the Strip is pretty well done, though venues come and go.
One old-timer is Destination. Over the years it has expanded tremendously to now occupy the whole two floors of the corner building. It is the largest gay bar in town, 99% are local Chinese. Girls are few but welcome. And the place is simply packed, packed, especially the “dance floor” where dancing is not the idea; topless is in, and go-go dancers give some shows. There several separate areas and bars over the two floors, more quiet than the dance floor.
The place is friendly, of course one has to behave as, well, as a bit gay. Or? In the toilets, Lei Feng welcomes you. I said Hi.
Funny to hear that still some Chinese say that “gays are a Western thing, Chinese do not know this”. Yeah, right. Even the emperors had some fun with it. In the past I also was able to visit the lesbian mega-evenings, but the bar moved away from Gongti (and so did the manager who allowed me in!).
In the run-up to the Olympics I had strongly suggested to the authorities NOT to close Destination for whatever lousy reason, to show Beijing’s openness. It did stay open the whole time.