Participants are asked to arrange their own accommodations. One of the closest hotels to the venue with easy access to the subway is the Hilton Garden Inn . Take the red line from NOMA to CUA's metro stop at Brookland (for details see: https://www.wmata.com/).
There are many other hotels close to CUA. One example is the Hampton Inn Washington DC NoMa Union Station, 501 New York Ave NE, Washington, DC 20002, which is located 0.5 miles (~13 min walk) from the NoMa Gallaudet red line metro station. This is 2 stops away from CUA.
There are also hotels along Baltimore Ave in College Park in the vicinity of the College Park and Greenbelt green line metro stations. From there it is 4-5 stops to CUA - change to the red line at Fort Totten. One example is the Best Western Plus College Park Hotel, 8419 Baltimore Ave, College Park, MD 20740. It is located 1.5 miles (~30 min walk) from the College Park Green Line Metro station.