Not a Boomer, but did get an internship that eventually became a full time job this way, during the post-2008 recession.

I got laid off and wasn’t getting any solid leads from traditional application processes or the town “career center” so I made a list of businesses in walking distance of eachother that might need my services, printed a few dozen copies of my resume, and beat the streets. I just walked in and asked for a manager but settled for whoever would talk to me, gave my brief elevator pitch, left a resume and contact info. A few called me and one actually worked out.

It is very humbling but it can work.