you really need to know what THEY like, there's too much variety in wine to generalize
even within "red" versus "white" the options are endless (in terms of distinctly different flavor characteristics, not just silly labels)
there are HUNDREDS of cultivars in the the vinifera species alone
even with one cultivar, it can be made in a traditional "old world" style that is more restrained, or a more opulent "international" style that is calculated to appeal to a handful of critics and noobs
if you just guess, you can waste $30-40 on something that they could have easily told you "oh, we don't drink [varietal / blend X]"
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edit: sorry, just had to comment on the East Coast USA wine suggestion
there's no shortage of wine from different points on the globe that is grown in more arid regions that require much less spraying (if any) of fungicides (anywhere east of the Rockies in the USA is much more humid, thus necessitating more and more human intervention in keeping vines alive)
(for example, cab franc is also grown into exceptional wine in eastern Washington state -- in the rain shadow of the Cascade mountains, which is a very dry climate region, as well as the Chinon subregion of the Loire Valley in France, which is where the cultivar is more of a native plant)
also, many of these wines with the same flavor quality level (and less chemical intervention) from areas more naturally hospitable to vines cost LESS than wines from small, niche, tourist-oriented wineries on the east coast; find out what your friend likes, and if they don't tell you specific regions, ask a wine merchant for selections from areas where vines are grown more sustainably