how do I set up an appt. for a flue shot ?

Both CVS and Walgreen's have online appointment making pages for their respective flu shots.  I got my shot from the local CVS by going to CVS.com and selecting the location of my specific CVS.  And then I selected the time and date for my shot.

It was easy and there was no waiting when I got the CVS according to my appointment.

NOTE:  Expectation is that both CVS and Walgreens will be giving the COVID vaxes in much the same way as they're doing the flu shots.  But that won't begin until the first responders and elderly in rest homes, i.e., the most vulnerable, get their shots which should begin by December.

Call your local chimney sweep, they might know.

Many pharmacies are walk ins...CVS, Walgreens, Rite Aid, Walmart, etc.

Call your doctor or pharmacy and they can help you set one up.

By calling your clinic.

I would just call the pharmacy. Walgreens, rite aid.