Unmarked street parking?

I just moved here and notice that there are lots of street parking spots with no meters around 5th ave, coffee shops like Subculture, etc and want to know if it’s okay to park there. I don’t see any signs saying it’s resident only parking or anything really (some have signs about hours that you can or can’t park, but some are completely void of a sign). Just want to make sure it’s actually okay to park there before I get a ticket or towed…