Yes, solo diving is very acceptable in the NE. Including NY and NJ. If and only if you earn it. It is a rite of passage on a boat. First you have to lose the bull**** and prove yourself. I can solo within my range just by letting the captain know, no drama and no macho, nobody cares -just my choice. I wouldn't dare ask solo for a pinnacle dive, that would be totally irresponsible.
My last dives were solo dives on the Atlantic while I sorted out new gear issues. Two dives at 70' for 30 min. -priceless to me. Treat it as a courtesy.
Solo is not regional. Nor is it a big deal if done correctly.