Is it okay to drink alcohol a week after wisdom teeth removal?

Yes; not with meds. As long as your mouth has sufficiently healed, i see no problem with the moderate consumption of alcohol a week after the teeth are removed. Do not, however, drink alcohol with any narcotic pain medication the dentist (oral surgeon) has given you.
In moderation. As alcohol can promote bleeding, you don't want to wash out the clot where tooth was removed.