"orientation talk" is correct and usable in written English.
For example, you could use it in a sentence such as, "She was asked to give the orientation talk for the new employees."
Tour guide Ethan Jiang gave a brief orientation, talking about the Getty's architecture and leading the group to spots outdoors overlooking the garden and the vast views of the city.
"It should be political in its orientation and talk about what we in the Democratic Party have really achieved in the West.
Host gatherings and invite people all of races, cultures, socio economic classes and sexual orientations, and talk, listen more deeply, and really hear one another.
After McDowell gave an orientation-session pep talk at a campus auditorium, attendees dispersed into six brainstorming groups organized by themes, including biology, habitat, culture, and product design.
From a brown-skinned, purple-haired animated narrator featured in "Talking Sexual Orientation With Jane" to a red-haired, fair-skinned, pimply boy wracked by puberty in "How the Boner Grows," characters of all skin colors, body types, and creeds populate the videos.
Go to orientations (open house) and talk to all your teachers.
In social interactions, people are discursively positioned, such as by overt mention of someone's identity, implications and presuppositions, evaluative orientations to ongoing talks and participants, and linguistic structures associated with a particular identity (Bucholtz and Hall 2005).
"These are real issues that override flashy talk about sexual orientation".
Gay-rights activists vs. Sponsors of the Sochi Games: In June, Russia passed a controversial law that bans "propaganda of nontraditional sexual relationships to minors" — opening up the possibility of criminalizing any talk of sexual orientation or gay rights.
