After my earlier post, also on WeChat, as well as postings by others, I could tentatively conclude: there might be indeed some isolated incidents but it is not a big trend. Well, a bit reassuring. It there were more, for sure some people would have come forward, or?
See here some of the postings I found, slightly edited but leaving the text as it is, just putting it all together:

quote
Don’t want to scare anyone. But please watch out your back. There is a group of Chinese guys attacking foreigners that go out with Chinese girls or guys. They always attack with baseball bats and iron loads. They already attacked in village, around heavens and wudaokou, the street of Blcu, houhai and nanluguxiang.They usually use a grey Bmw but pay attention to other cars too. Usually if they are driving and see foreigners and Chinese together they get out of the car and start yelling Chinese girls belong to Chinese guys. This is the info that I got from victims that contacted me yesterday. They attack foreigners: white, blacks, Hispanic
Please share and if you know any case please tell them to report to the police and write an article at the magazines that are read by expats. …
Call the police or go to the police station to report the situation. They already know this but did not identify them.
Heard that a group of 4 had baseball bats yesterday @ wudaokou and that this group is looking only for foreigners. So anyone knows if this is true or not?? Because my female friend also got attacked by by a group of guys in Uibe area.
All the cases happened with foreigner guys walking with Chinese or Mongolian girls
unquote

And this is the only published article I could find:
http://www.theworldofchinese.com/2014/12/foreign-victim-of-alleged-attack-says-stay-polite/

Well, if anybody has comments, let me know. And always better to be careful. Anyway I think Beijing is safer than many parts of Belgium where unfriendly foreigners are aggressive towards … Belgians. Or, the world upside down.

Before the holiday period, one more great get together at More’s restaurant for the brave souls who have endured (?) China for at least ten years.

The next round will be on Wednesday 7 January as the first Friday is 2 January, not so convenient.

These days on Wechat several postings on reported incidents where foreigners are being attacked in Beijing by a group of Chinese men and beaten up. Several locations are mentioned. Attacks seem to occur if the foreigner is accompanied “by Chinese or Mongolian girl”.
Those “rumors” are not new and we have had a case of an American intern being beaten up on the street, for no reason, years ago. He left China the next day.
I would recommend, if those things happen, to file a police report and insist they check the CCTV cameras on the street. They are installed a bit everywhere.
It would be interesting to know in how far this is happening. And the police should seriously look into this, to check in how far those incidents happen, and why.

On 14 November the Belgian Embassy in Beijing organized a nice reception in the Conrad Hotel for over 300 guests. H.E. Michel Malherbe was a good host as usual.
See some few pics of the event, also with some of the Belgian beer served along with a buffet of “Belgian cuisine” (oh well the cooks tried their best but Renaat Morel is stile “the one”!)

Portal Belgium.be:
Belgium is an ancient and yet still young nation. Belgians were first mentioned about 2,000 years ago (by Julius Caesar in his book on the Gallic Wars). Nevertheless, Belgium was for centuries part of a larger state structure.
The independent State of Belgium was born on October 4, 1830.
National Day is celebrated on July 21. Its commemorates the day on which Leopold I took the constitutional oath as the first King of Belgium, on July 21st 1831.
As July is a rather quiet month, especially in Beijing, the unofficial day for “National Day” is 15 November. We mostly call it “King’s Day” however the correct term is King’s Feast.
The Feast Day of the German-speaking Community is also the Day of the King.

King’s Feast (Wikipedia)
The King’s Feast (Dutch: Koningsfeest, French: Fête du Roi, German: Festtag des Königs) has been celebrated in Belgium on November 15 since 1866. Since 2001, the Belgian Federal Parliament holds a ceremony in honor of the King, in the presence of members of the Belgian Royal Family and other dignitaries. Federal ministries are closed on this day. Traditionally, a Te Deum is sung as well as a private observance being held.
November 15 is the name day of Leopold (the feast of Saint Leopold in the German liturgical calendar) and Albert (the feast of Saint Albert the Great in the General Roman Calendar). In 1951, King Baudouin decided to honor November 15, as did his brother King Albert II. During the regency of Prince Charles, the designations Day of the Dynasty or Feast of the Dynasty were used, and these terms are still often erroneously used. However, it is not the correct name, as was confirmed in a circular letter in 1953.