I have a ruger lcp in my front pocket all of the time.Why?You never know when you will need it AND it is small,liteweight,and concealable.
When not at work I usually have an HK usp compact .357 sig on me as well.Why?Because it has ample shots,I shoot it well,and enough power to end the fight.
Same for the Bersa .380,colt det special,or taurus .44 snub that I may wear depending on clothing.