As far as I know, it is a myth that you cannot serve someone in the courthouse in New York. You can serve someone in court and it will be a valid service. Not to be confused with the rule that if someone comes to New York to contest jurisdiction, that cannot be used to serve them in New York and obtain service that way. So I would think that regular CPLR 308 rules apply for summonses, petitions, subpoenas, etc.
If you know of a rule that states otherwise, you can leave it in the comment.