equivalent \addlinespace command for table columns?

I just discovered the Latex command \addlinespace which increases the whitespace between the rows in a table. I was wondering if there is a command like that to increase the whitespace between the columns?

• For this you could (should) define a new column type. So, \usepackage{array}\newcolumntype{R}{@{\hspace{\dimexpr2\tabcolsep+3pt}}r} and then \begin{tabular}{rRRRR}. Try it. – Werner Jan 3 '13 at 18:56

Whether to be applied to one table:

\documentclass{article}

\begin{document}

\begin{tabular}{|c|c|c|}
a & b & c
\end{tabular}
\endgroup

\end{document}


Whether to be applied globally:

\documentclass{article}