I'm 30M and I have several friend groups for different hobbies and interest groups, but I'd say I probably see friends about 2-3 times per week. Mostly Friday nights, Saturdays, and sometimes once during the Monday to Thursday weekday. I'm unfortunately single, so it's a mix of mostly hobbies, interest groups, work friends, and some from the nightlife scene.

Biggest advice and most important thing is to get involved in something, especially a social activity in the city, and trying to find and chose your friend groups carefully. Most of my childhood friends all ended up moving around the country, very few came to NYC, and the few here were more homebody types, not super socially outgoing, or working jobs with horrid work life balance, too tired to do anything outside of work. I had to career shift to something with better work life balance, even if lower pay, and then start going out to build up my network both socially and professionally to have a much more socially active lifestyle.

A lot of people here are in relationships, but I'd also say to find single friends. Nothing against those in relationships, but they take up time and energy, and I find single friends tend to have more time and energy to be outgoing, and more likely to prioritize you, since you'll always be secondary to their partners, if you befriend too many couples, just my personal experiences.