How to have multiple authors share the same affiliation?

[embeh]

I am writing a paper using the CHI Proceedings Template with three authors that all have the same affiliation (and even share the same email pattern (firstname.lastname@institute.org)).

Right now, I am using the pattern of the example:

\numberofauthors{2}
\author{
\alignauthor Author 1
\affaddr{Affiliation}\
\affaddr{Affiliation}\
\email{author@a.com}
\alignauthor Author 2
\affaddr{Affiliation}\
\affaddr{Affiliation}\
\email{author2@b.com}
}
(just with 3 authors) and it takes up a lot of space and looks ugly.

Is there a way to do this better with sigchi.cls without repeating the affiliation three times?