Is there any problem with drinking socially during the Three Weeks?
Background: My Rav held that large social gatherings even without music give a person more Simḥah than privately listening to music, and as such he held that things many people avoid - eg., listening to music on the radio or even going to the movies, in which others' comments and interactions with you are a nuisance (but which he did not endorse year-round anyway, but in theory, if a "Kosher" movie were made that didn't have inappropriate previews, etc. etc. etc...) are much less problematic than going to a baseball game, for example, in which being part of the crowd is the experience.
I know drinking is not generally prohibited during the Three Weeks, but if we take the idea that large social gatherings are inappropriate, would smaller social gatherings with drinking involved be a problem, since social gatherings give one Simḥah and we know that wine provides Simḥah?
Does this extrapolation make sense based on the above, or is it an unnecessary restriction?