consumerism is something i learned to avoid and hate while growing up a poorfag. living frugal is all i know and it's saved me so much and helped me purchase things i actually need and would benefit me in the long run, such as a used car with high fuel efficiency and being able to pay it off in full.
if i ever want to buy something, i sit on it for a couple days and ask myself if i still want it and I usually grow out of that want by then.
also thrift shopping is my guilty pleasure and i tend to stick to going there when i want to find something, i tend to spend no more than $150 each year by sticking to thrifting, compared to shopping at retail stores.
I'm also thankful for the internet, which has lots of free and "free" resources. pirating/emulating video games has saved me thousands of dollars, i mainly only spend money on the physical console or memory space.
youtube is amazing for recipes, lessons, and entertainment. in response to OP's activities that need money, i usually pull up karaoke versions of songs on youtube during get togethers and we do that on the TV. i avoid movie theaters and prefer to just wait for a digital version of said movie i could find on a streaming website.
also, avoid subscription services besides basic internet and phone service. i only subscribe to nintendo online and it's $35 for a family plan and i'm sharing with 4 other people so it comes out to $7 a year for me. i avoid subscription online games such as FF14 or WoW and for free-to-play games I tend to avoid the gacha aspect without spending real money. doing google opinion reward surveys can give you google credit that acts as real money if you reeeally want to participate in the smartphone gachas every once in a while.
i can admit i do have a hobby that does require spending money to obtain the items, but as i said before, i stick to retail or buying secondhand. i think i have spent an average of $5 per month with my hobbies.
for other non-internet based activities that don't require money. i go on walks, play with my cats, take photos, play musical instruments, draw...
i see so many people LARPing as poor and hating materialistic things, but all i see them post on social media is name brand or brag about some highly acclaimed product or e-beg so they can indulge in some trendy thing at the moment.