Years ago, I dated a RA. He told me he didn't expect me to not drink anymore than he expected me to ask him to not eat apples (I'm allergic to apples). He said, "You don't have a drinking problem; I do."
One of my RAXH's big issues when he's ranting at me post-divorce is that I never really wanted him to stop drinking "because if you had, you would have quit drinking completely to set a good example for me." I like that attitude a whole lot less because it to me reeks of placing the responsibility on someone else.
If, however, he had gotten into rehab & recovery while we still had a marriage, I might have considered not drinking around him, had he asked. I don't drink a lot anyway, so it wouldn't have been a big sacrifice. I think it depends on the context how I would have felt about a request like that.