The overabundance of glowsticks on U Street over the last three nights of the previous work week could only signal one of two things: a) Haunted House season had arrived early, or b) Deadmau5 sold out three consecutive nights at the 9:30 Club. The Toronto DJ, who is as famous for his enormous glowing mouse head as for his propulsive bass-heavy electronic beats, played two long sets on Wednesday and Thursday and a truncated one…