We warned you last week as soon as news arrived that Portland's well loved Salt & Straw ice cream would be making its way to San Francisco with two new scoop shops in 2017, and now the time has come. The ice creamery will be doing preview pop-ups Friday and Saturday from afternoon to evening in both the neighborhoods where the brick-and-mortar shops are set to open, Hayes Valley and upper Fillmore, serving up $1 scoops, so, practically free. (The first shop to open will be at 2201 Fillmore Street, in the spring.)

As Eater tells it, the first appearance will be on Hayes Street at noon on Friday, December 9. Then the schedule goes like this:

Friday, 12/9, noon to 3 p.m. on Hayes Street between Laguna and Octavia.

Friday, 12/9, 6 p.m. to 9 p.m. on Fillmore Street at Sacramento

Saturday, 12/10, noon to 4 p.m. on Fillmore Street at Sacramento

Saturday, 12/10, 6 p.m. to 9 p.m. on Hayes Street between Laguna and Octavia.

And each dollar you use for a scoop of Gingerbread Cookie Dough or whatever (they haven't announced what the flavors will be) will go entirely to charity, to the YMCA's Western Addition Family Resource Center, to be exact.

And given this is prime Christmas shopping time in two bustling retail districts, you can expect lines. Consider pitching a tent, Black Friday style.

Previously: Portland's Salt & Straw Ice Cream Arrives In SF For Pop-Ups Next Week, Opening Two SF Shops In 2017