Bob Dylan, Linda Ronstadt, Arlo Guthrie, Melissa Manchester . . . all of the big names of the [’]60s and [’]70s played The Bitter End, and the club still has the posters to prove it, so old they can’t really be called “yellowing,” they’re now a permanent deep woodsy brown. This is no nostalgia club, though: The Bitter End continues to act as a tryout house for new singer-songwriter types (primarily), many of whom are quite talented.