I would drop HK net bar... can not see it having commercial value as an IDN sale really (can not see the net bars in HK choosing it over the .hk or .cn version - or at the moment them even bothering with that) - unless you plan to develop these domains yourself or adsense payments pick up a lot and Baidu overt is high.
Shanghai and Beijing should be worth keeping.
Not a big fan of 818 either... but personal preference.
Others are generally I would suspect longer term IDNs to own and will be awhile before you have people chasing any of them (once again personal perspective only).
The overt values for these on Baidu presently most likely will answer your question on if they are worth keeping (if searches are low - for these particular IDNs I can not see them growing a lot.. e.g. Chinahotel is very unlikely to be a type in for a native speaker who will be more focused I suspect with adding a city name and Westerners / foreigners will not use Chinese).