Hello Jemima,
Having a drink or 2 is fine, sometimes I will have 3 depending on the mood. But alcohol gives me headches and a woosy stomach so I only have a drink once in a blue moon. But one beer a day I can do to help me relax if need be.
3 pints of IPA for me is the sweet spot. I fast all day, tho and might have some cheese for lunch and usually drink on an empty stomach after running while I make dinner. So it hits me.