Fill a spray bottle with vinegar, spray evenly on all fabric, vacuum the carpet and saturate, let sit 5 min. and then blot with a damp white towel, then blot again with dry white towel or paper towels.
Spray and wipe off all other surfaces. (dashboard, windows, etc.) Vinegar is a natural non-toxic cleaner and deodorizer, can be used on all surfaces, cleans streak free, so there is no need to rinse after cleaning.
The vinegar smell with dissipate in a couple days, the beer smell and stains will be gone.