Should a Christian work as a bartender?

As Christians, we are called to "go into all the world and preach the
good news to all creation" (Mark 16:15). Clearly, bars are usually
filled with people who need to hear the gospel. Further, many people
will open up to a bartender more than they would to some other random
individual, especially when they are intoxicated. So, yes, a Christian
might have some ministry opportunities while working as a bartender.
However, working and building relationships in a sinful environment,
surrounded by ungodly music, the abuse of alcohol, and sexual
temptations for several hours a day is clearly unwise. "What
fellowship does righteousness have with lawlessness? And what
partnership does light have with darkness?" (2 Corinthians 6:14).

Realistically, after a long shift of serving drinks in a bar, would
the spirit of a Christian be edified? Would he/she leave with an
increasing hunger for God's Word? Would his/her mind be filled with
holy images? Would his/her thoughts be that of Philippians 4:8?
Scripture clearly teaches us to "hate everything that is evil and hold
tight to everything that is good" (Romans 12:9). Perhaps a Christian
feels he/she would enjoy interacting with unbelievers to share the
message of Jesus Christ. But is that the biblical model of evangelism,
to share in their lifestyle? Yes, Jesus ate and drank with sinners
(Matthew 11:19); however, with a heart of true compassion, His primary
goal was, and still is, to save sinners. He never indulged in their
lifestyle; rather, He commanded them to come out of it and live godly
lives (2 Corinthians 5:17).

Many refer to 1 Corinthians 5:10 when debating over whether we should
work in an environment where sin is prevalent. However, Paul is not
encouraging us to enter into full-time business relations with the
"fornicators of this world, or with the covetous, or extortioners, or
with idolaters." He is simply saying we cannot escape their company
altogether: "In that case you would have to leave this world." But we
must not spend huge amounts of time with those indulging in evil
lifestyles—as is certainly the case when working in a bar—in hopes of
having a moment or two in which to share the gospel. Realistically,
not many bar owners would tolerate a bartender who spent a majority of
his/her time evangelizing the customers. He knows that would be
detrimental to his bottom line. The fact is that people who go to bars
are not usually in any frame of mind to hear the gospel.

As Christians, we are to obey the commandment of God to "abstain from
all appearance of evil" (1 Thessalonians 5:22). So "let everyone that
names the name of Christ depart from iniquity" (2 Timothy 2:19).