Thank you for your article Daitetsu.
In my opinion, just sitting is much more beneficial than attachment to lotus or any other form of sitting.
Just yesterday I stumbled upon an interesting article:
https://gokhalemethod.com/blog/67213
An excerpt:
Any suggestions for sesshin for winter break?
San Francisco Zen Center has some events around the end of the year, and you may want to consider those. For example, this ...
Jundo Today, 01:13 PMhttps://www.sfzc.org/calendar/events...retreat-winter