I think a deeper, core issue is being ignored. Why did he feel the need to lie to your partner about what he was doing? Why was he unable or unwilling to tell her that he's just having a beer? Is the issue that she would unfairly demand he not do this? Or is there some legitimate reason she might object? Either of these is indicative of a need to communicate about an issue.

In a healthy relationship, you should not only feel free to do what you want, you should also feel comfortable communicating these things with your partner. If you want to do something that would make your partner flip out, either there's something wrong with your desire or your partner's reaction and you need to talk about it.