Right around 6PM at my apartment, the downstairs tenants light up with the most awful, stanky skunk-weed. You literally cannot keep the windows open; and yet, in the middle of summer and no central AC, you can't afford to be there with them closed, either. So, in effect, my neighbour forces me to ensure I'm not home at that hour.
Anyone you could bribe to do the same near your office? :P