Are there any street food vendors/quick bites in downtown Seattle?

hello. i’m coordinating a conference at the Seattle Sheraton for 1,500 people this coming January and I’m looking for quick lunch options within walking distance of the hotel. i’m already putting down the Pike Place Market but i’m not from the area and i’m not sure what other places i can recommend. everything i’ve found seems to be more upscale, sit-down type place rather than a casual spot to get a quick, tasty lunch. Any ideas? Thanks!