Few years back when our office was located at 15th and L, I used to park in the bike spots at McPherson Square. No meters, but a sign that said 4-hour parking
Parked there from 7-4 for three years with not issues, then one day everyone got a ticket...few months later another ticket. I was able to move into the garage in my building for a monthly fee, but I noticed others still parked in the spots all day. They eventually added a meter for the spots. Whats the point of bike spots if they can't be used all day! DC sucks and is not bike friendly, even though a large number of Gov't workers commute on bikes and can park in Gov't garages for free!
BTW...I never paid the tickets, and never got any notices.....DC is a bureaucratic mess!