LonelyShadow/Cohiba,
I'm also in my 20s and know exactly what you are saying. It definitely feels a lot harder when peers are all into drinking (though seemingly 90% of my peers can do it responsibly and I'm in the 10% that do stupid things).
None of my friends have kids and while some are married, there's definitely a lot of drinking going on and drinking to get drunk, not just a glass or two of wine at dinner, which at least from my perspective, seems to be more the norm for older folks.
With that said, I know plenty of older people that drink a ton, so I don't think the challenges will reduce over time in that respect.
I'm on Day 11 here and been presented with 3 great opportunities to drink socially. I've found that I can actually enjoy myself when not drinking, but I need to commit mentally to enjoying it and not feel bad about myself for being unable to handle alcohol.