We really wanted to title this Out and About: This Will Be Short Because We’re Tired From DCist Happy Hour Edition. But brevity is the soul of wit! FRIDAY: >> Drummer Cindy Blackman (who used to play for Lenny Kravitz), is bringing her jazz styling to the Blues Alley in Georgetown. >> The National Philharmonic plays the beloved season favorite, Handel’s Messiah, at the F. Scott Fitzgerald Theatre in Rockville. 8 p.m. Call 301-762-8580 for…