That would probably be a yes.
New York State's marriage law will (not might) change gay life permanently. It will change how we socialize, and why. It will be a rather sudden shift. It will impact the number of people who are wondering when to come out. It will change the behavior of many who are out.
I know, it sounds like a bit much...
Imagine… now we have places such as gay bars and gay bathhouses. They became popular because gay men had few regular social outlets to meet. Or safely have sex. Most weren't designed with the concept of finding a life partner in mind. It's happened, of course (Dan Savage met his in an interesting way for example.) But now, the idea of going to a sex club because you didn't entertain the idea of spending you life making love to one person just lost its reason for being. (Yes, NY has straight swinger's clubs and businessmen's strip joints. But they didn't come about because of something a person couldn't do. They came about because of what else a person could do.)
There will be people who will change their behavior because now they can legally marry in a state where they don't have to live in to do so. And several states recognize any valid marriage from another state.
Of course, there will still be couples with open relationships. Straight marriage has that. But many the types of activities - from street cruising to even unsafe sex - will alter dramatically I suspect. Self esteem is a reason that crops up often in explanations of why they occur. Self esteem related to what rights one has in society. How equal. How much opportunity. Validity. It should even change the way we look at each other, that is respect of others, and how deeply we look into each other.
While it may not change the 'you're hot, I wanna have sex with you' types (straights got 'em too) it will certainly lead to more 'I wanna get to know you before we have sex' scenes. As in - you don't have sex the first, second, third time you meet. Leading to an increase in - gasp - COURTING someone! Why have hollow meaningless sex and hookups when what you really wanted was to settle down with one very special person. When what you really needed to hear was when you found that special person, you could build a life together. And no one could stop you from doing it.
I can see this altering drinking habits. I would even look for evidence that some types of entertainment venues will increase business. Piano bars would do better. Bars with strippers would decline. Owners would want to alter their ambiance to actually see and hear the person you're talking to. Or would want to. Owners will want to accommodate people looking to date.
This should impact suicides, which should decrease. (See validity, above…) And as for boosting the morale of the younger gays and lesbians, who really were wondering what was the hold up. Well, hold over. There will be legal challenges from other states, and perhaps within New York State itself. But really, the reasons for being against gay marriage look pretty stupid considering what's been going on in straight marriages for decades.
Meanwhile, I wonder if you can get a hotel in New York this Sunday?
And heaven forbid you own a jewelry store!