Will directly buying barstool can help?

Long answer? No.

Can hurt?

IF one spends ones last money on a barstool instead of buying needed food, medicine, or rent? Yes. Buying barstool can hurt. Especially if ones significant other smashes bought barstool on ones head.

Not really. Perhaps you need a stool sample?

All you need is patience and wait for someone to get up and you can sit down in that pub. You don't have to buy a stool.