COVID-19 is transmitted from human to human, and as such, the key behavior that drives the spread of COVID-19 is close proximity among people. In particular, large groups of people indoors facilitate the occurrence of super-spreading events, where a single contagious individual may infect multiple people at once. Recent research highlights, in particular, the role of restaurants and gyms in driving the early spread of COVID-19. Figure 2 presents the trends for a set of activities that bring people from different households into indoor spaces. We note the general upward trend in many of these activities since April, with reports of having been in a room with people who are not members of the household in the preceding 24 hours jumping from 26% in April to 45% in October. Large group activities have particularly jumped in frequency. Reports of being in groups of 11 to 100 or more in the preceding 24 hours more than doubled, from 2.4% of respondents in April to 6.4% in October (Figure 3).