Then the other group members will wonder why you get stuff free while they have to pay, or they might doubt why you chose that particular pub. If you really nee

Then the other group members will wonder why you get stuff free while they have to pay, or they might doubt why you chose that particular pub. If you really need a physical reward for doing something you enjoy it would make more sense to agree a deal with the pub, like "second drink on the house" for the whole group.