Summer concerts planned, Sea Dogs increase capacity as state drops distance requirement Gov. Mills announced Thursday that no physical distancing will be required at outdoor venues as of May 24, opening possibilities for summer entertainment. Share The socially distanced fans in the sparse crowds at Hadlock Field this spring could soon have lots of company. Shawn Patrick Ouellette/Staff Photographer The state’s decision to lift outdoor capacity limits and distancing requirements on May 24 has opened up options for entertainment in Maine this summer, prompting the Portland Sea Dogs to increase to full capacity in June and outdoor concert venues to start booking shows for August.