When I was in my teens and twenties I didn't see much of a need to go to SCs when I had a girlfriend (or later a wife). So I'm actually glad I didn't go most of the time. So after I bought a house and most of my free time and free money went into fixing or improving the house and saving/investing. Just set aside something modest, like 10% of your gross wages, as your discretionary fun money. If you want to use some of that fun money for SCs, so be it. Personally I would spend it on stereo / music / and beverages and invite friends over or have BBQs, like I did in my 20s. But SCs are fun too.
If you are looking for investment goals or guidelines, maybe set aside equals amounts. I.e., if you want to spend $400 on SCs, then set aside another $400 for saving ($800 total). You can put the saving money into a 401k, but I would buy a 12 month CD each month, first. You would have a CD mature each month, then roll it into another 12 month CD. The money is more accessible than a 401k, which is important when you are starting out. Basically when you have an emergency, you know you have a CD at maturity, which you can tap.