Three courses in the Tufts University Department of Theatre, Dance, and Performance come together to celebrate diverse and extraordinary work in the TDPS Winter Workshop Festival. Tonight, the Critical Drag course presents the first of two performances of its final project, “Welcome to Dragistan,” directed by Kareem Khubchandani. Tickets are $5 through the Tufts Online Ticket Office, but this show is sold out; a second performance will be presented at 10 p.m. on Saturday, December 10.