Will publisher waive fee if currently unaffiliated? I am in between jobs and want to send a quick note to a journal. However, I do not have any lab to pay the ridiculous publishing fees, is there any way I can ask the journal to waive the publishing fees? Is being unaffiliated sufficient grounds for this?
This surely depends on the journal, and probably on your specific case (I don't imagine it's common to have a blanket waiver for authors without affiliation).    Many journals do provide support to authors without funding.  For instance, look at the PLOS FAQ #4: 

https://www.plos.org/publications/publication-fees/


  Publication Fee Assistance is intended for authors who demonstrate financial need. [...] PLOS considers applications on a case-by-case basis. 


Try looking at the webpages for journals you're considering for such information.  If you can't find anything, you can try contacting the journal.