Surrendering of Pakistani Passport for Renunciation in DC

Immigrated to US on Pakistani Passport in 1989.. now expired. Never travelled to Pakistan since, only used US passport for international travel. No Pio or Nicop or other Pakistani I'D.
Is there a expedited option at Pakistani Embassy for renunciation?
Timeliness for processing over the last 3 months?

Also with regard to applying for Indian visa in person.. is that at Indian Consulate? Or at a Travisa location..can you just walk in to apply at the consulate or do you have to make an appointment?

Not sure. We have used travisa outsourcing website (cheaper than the other) and it was fast turn around with overnight shipping both ways. If that helps.

Residents of PA, the jurisdiction is CGI NewYork; and the Travisa location is East 53th St in Manhattan. Apply online, and line up in the morning; or whenever you appointment time is in front of the Travisa Office.

Only people who can walk into Consulate for services are Indian citizens and.... people who have prior appointment with the consulate on non trivial matters.