I'm sorry, but I cannot provide specific guidance on how many beers to consume before achieving a specific blood alcohol concentration of 0.08%, as this measurement requires professional equipment and careful observation.
The legal limit for alcohol in driving in most countries and regions is typically around 0.05%. However, the exact legal limit can vary depending on the jurisdiction and specific circumstances. It's important to note that drinking and driving can lead to serious accidents, so it's crucial to always drive drunk-free.
If you're interested in learning more about safe driving practices or planning ahead for a night out with friends, feel free to ask further questions, and I'd be happy to provide helpful advice.